TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
TL 50 [3 records]
Record 1 - internal organization data 2013-07-16
Record 1, English
Record 1, Subject field(s)
- Toxicology
- Medicine and Health
- Nuclear Science and Technology
Record 1, Main entry term, English
- median lethal time
1, record 1, English, median%20lethal%20time
correct, standardized
Record 1, Abbreviations, English
- MLT 1, record 1, English, MLT
correct, standardized
Record 1, Synonyms, English
- LD 50 time 1, record 1, English, LD%2050%20time
correct, standardized
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The time required for the death of 50% of a large population of a given species that has received a specified absorbed dose. 1, record 1, English, - median%20lethal%20time
Record number: 1, Textual support number: 1 OBS
LD: lethal dose. 2, record 1, English, - median%20lethal%20time
Record number: 1, Textual support number: 2 OBS
median lethal time; LD 50 time; MLT: terms, abbreviation and definition standardized by the International Organization for Standardization (ISO). 2, record 1, English, - median%20lethal%20time
Record 1, French
Record 1, Domaine(s)
- Toxicologie
- Médecine et santé
- Sciences et techniques nucléaires
Record 1, Main entry term, French
- temps létal 50 %
1, record 1, French, temps%20l%C3%A9tal%2050%20%25
correct, masculine noun, standardized
Record 1, Abbreviations, French
Record 1, Synonyms, French
- TL 50 1, record 1, French, TL%2050
correct, masculine noun, standardized
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Temps nécessaire pour que meurent 50 % d'une grande population d'une espèce donnée, qui a reçu une dose absorbée déterminée. 1, record 1, French, - temps%20l%C3%A9tal%2050%20%25
Record number: 1, Textual support number: 1 OBS
temps létal 50 %; TL 50 : termes et définition normalisés par l'Organisation internationale de normalisation (ISO). 2, record 1, French, - temps%20l%C3%A9tal%2050%20%25
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2012-05-04
Record 2, English
Record 2, Subject field(s)
- Environmental Studies and Analyses
- Toxicology
Record 2, Main entry term, English
- lethal time fifty
1, record 2, English, lethal%20time%20fifty
correct
Record 2, Abbreviations, English
- LT 50 2, record 2, English, LT%2050
correct, see observation
- LT50 3, record 2, English, LT50
correct, see observation
Record 2, Synonyms, English
- lethal time 50 1, record 2, English, lethal%20time%2050
correct
- lethal time 50% 3, record 2, English, lethal%20time%2050%25
correct
- 50% survival time 1, record 2, English, 50%25%20survival%20time
correct
- median survival time 4, record 2, English, median%20survival%20time
correct
- mean survival time 5, record 2, English, mean%20survival%20time
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The time required for the death of 50% of a large population of a given species that has received a specified absorbed dose. 6, record 2, English, - lethal%20time%20fifty
Record number: 2, Textual support number: 1 OBS
LT 50; LT50: When there is no space between the letter "T" and the number "50", the number is subscripted. 7, record 2, English, - lethal%20time%20fifty
Record number: 2, Textual support number: 2 OBS
Compare with "medium lethal time" and "median tolerance limit". 7, record 2, English, - lethal%20time%20fifty
Record 2, French
Record 2, Domaine(s)
- Études et analyses environnementales
- Toxicologie
Record 2, Main entry term, French
- temps létal 50
1, record 2, French, temps%20l%C3%A9tal%2050
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- temps létal 50 % 2, record 2, French, temps%20l%C3%A9tal%2050%20%25
correct, masculine noun
- TL 50 3, record 2, French, TL%2050
correct, see observation, masculine noun
- TL50 4, record 2, French, TL50
correct, see observation, masculine noun
- TL 50 3, record 2, French, TL%2050
- temps moyen de survie 5, record 2, French, temps%20moyen%20de%20survie
correct, masculine noun
- temps de survie 50 p. cent 6, record 2, French, temps%20de%20survie%2050%20p%2E%20cent
masculine noun
- temps de survie 50 % 7, record 2, French, temps%20de%20survie%2050%20%25
masculine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Temps nécessaire pour que meurent 50 % d'une grande population d'une espèce donnée, qui a reçu une dose absorbée déterminée. 8, record 2, French, - temps%20l%C3%A9tal%2050
Record number: 2, Textual support number: 1 OBS
Le TLM (temps létal moyen) est le temps moyen, pour une concentration donnée, au bout duquel tous les individus d'une population donnée périssent, alors que le TL 50 représente le temps théorique au bout duquel 50 % des individus de la population ont péri sous l'effet d'une concentration supérieure à la CL 50. 4, record 2, French, - temps%20l%C3%A9tal%2050
Record number: 2, Textual support number: 2 OBS
TL 50; TL50 : Lorsqu'il n'y a pas d'espace entre la lettre «L» et le chiffre «50», ce chiffre s'écrit en indice. 9, record 2, French, - temps%20l%C3%A9tal%2050
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Estudios y análisis del medio ambiente
- Toxicología
Record 2, Main entry term, Spanish
- tiempo medio de supervivencia
1, record 2, Spanish, tiempo%20medio%20de%20supervivencia
masculine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2008-05-16
Record 3, English
Record 3, Subject field(s)
- Environmental Studies and Analyses
- Toxicology
- Occupational Health and Safety
Record 3, Main entry term, English
- lethal concentration 50
1, record 3, English, lethal%20concentration%2050
correct
Record 3, Abbreviations, English
- LC50 2, record 3, English, LC50
correct, see observation, standardized
Record 3, Synonyms, English
- lethal concentration 50% 3, record 3, English, lethal%20concentration%2050%25
correct
- median lethal concentration 4, record 3, English, median%20lethal%20concentration
correct, see observation
- lethal concentration fifty 5, record 3, English, lethal%20concentration%20fifty
less frequent
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The concentration of a material in air that on the basis of laboratory tests (respiratory route) is expected to kill 50% of a group of test animals when administered as a single exposure (usually 1 or 4 hours). 3, record 3, English, - lethal%20concentration%2050
Record number: 3, Textual support number: 1 OBS
The LC50 is expressed as parts of material per million parts of air, by volume (ppm) for gases and vapours, as micrograms of material per litre of air (mg/L), or milligrams of material per cubic metre of air (mg/m³) for dusts and mists, as well as for gases and vapours. 3, record 3, English, - lethal%20concentration%2050
Record number: 3, Textual support number: 2 OBS
LC50: abbreviation standardized by ISO. 6, record 3, English, - lethal%20concentration%2050
Record 3, French
Record 3, Domaine(s)
- Études et analyses environnementales
- Toxicologie
- Santé et sécurité au travail
Record 3, Main entry term, French
- concentration létale 50
1, record 3, French, concentration%20l%C3%A9tale%2050
correct, feminine noun
Record 3, Abbreviations, French
- CL50 2, record 3, French, CL50
correct, see observation
- CL 50 1, record 3, French, CL%2050
correct, see observation
- LC50 3, record 3, French, LC50
avoid
Record 3, Synonyms, French
- concentration létale 50 p. 100 4, record 3, French, concentration%20l%C3%A9tale%2050%20p%2E%20100
correct, feminine noun
- concentration létale 50 % 1, record 3, French, concentration%20l%C3%A9tale%2050%20%25
correct, feminine noun
- concentration létale moyenne 1, record 3, French, concentration%20l%C3%A9tale%20moyenne
correct, feminine noun
- concentration létale médiane 5, record 3, French, concentration%20l%C3%A9tale%20m%C3%A9diane
correct, see observation, feminine noun
- teneur létale 50 p. 100 4, record 3, French, teneur%20l%C3%A9tale%2050%20p%2E%20100
see observation, feminine noun, less frequent
- TL 50 4, record 3, French, TL%2050
see observation, less frequent
- TL 50 4, record 3, French, TL%2050
- teneur létale moyenne 4, record 3, French, teneur%20l%C3%A9tale%20moyenne
see observation, feminine noun, less frequent
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
[...] quantité d'une matière sous forme de vapeur, exprimée en millilitres par mètre cube d'air, [ou] sous forme de poussière ou de brouillard, exprimée en milligrammes par litre d'air et mesurée à la pression atmosphérique normale [...] qui, lorsque administrée par inhalation continue à un groupe échantillon d'au moins 10 jeunes rats adultes albinos, mâles et femelles, [...] durant une heure [...] ou durant quatre heures, cause la mort de 50 pour cent du groupe dans les 14 jours [...] 6, record 3, French, - concentration%20l%C3%A9tale%2050
Record number: 3, Textual support number: 1 OBS
CL50 : Lorsqu'il n'y a pas d'espace entre le chiffre 50 et l'abréviation, ce chiffre se place la plupart du temps en indice. 7, record 3, French, - concentration%20l%C3%A9tale%2050
Record number: 3, Textual support number: 2 OBS
teneur létale 50 p. 100; teneur létale moyenne : Dans les «Enviroguides» publiés par Environnement Canada (en anglais cette collection est appelée «Envirotips»), le terme «teneur» a été choisi de préférence à «concentration». 7, record 3, French, - concentration%20l%C3%A9tale%2050
Record number: 3, Textual support number: 3 OBS
concentration létale médiane : La norme ISO définit « lethal concentration»/«concentration létale» au sens de «median lethal concentration»/«concentration létale médiane»; la concentration létale médiane est l'expression la plus courante de la concentration létale, mais elle n'en demeure pas moins un spécifique. 8, record 3, French, - concentration%20l%C3%A9tale%2050
Record number: 3, Textual support number: 4 OBS
LC50 : abréviation normalisée par l'ISO. 8, record 3, French, - concentration%20l%C3%A9tale%2050
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Estudios y análisis del medio ambiente
- Toxicología
- Salud y seguridad en el trabajo
Record 3, Main entry term, Spanish
- concentración letal media
1, record 3, Spanish, concentraci%C3%B3n%20letal%20media
correct, feminine noun
Record 3, Abbreviations, Spanish
- CL50 2, record 3, Spanish, CL50
correct, feminine noun
Record 3, Synonyms, Spanish
- concentración letal 50 3, record 3, Spanish, concentraci%C3%B3n%20letal%2050
correct, feminine noun
- LC 50 3, record 3, Spanish, LC%2050
correct, feminine noun
- concentración letal mediana 3, record 3, Spanish, concentraci%C3%B3n%20letal%20mediana
feminine noun
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Concentración, calculada estadísticamente, de una sustancia en el medio, que se espera que mate al 50% de los organismos de una población bajo un conjunto de condiciones definidas. 2, record 3, Spanish, - concentraci%C3%B3n%20letal%20media
Record number: 3, Textual support number: 1 CONT
Sin embargo, se debe tener en cuenta que una definición más exacta requiere la utilización de límites cuantitativos de contenido de sustancias tóxicas o el uso de definiciones que establecen LC50 (concentración letal media que mata al 50% de los organismos de laboratorio) tales como las que se usan en Estados Unidos (Environmental Protection Agency, 1980) o en el Estado de Sao Paulo, Brasil (CETESB, 1985). 4, record 3, Spanish, - concentraci%C3%B3n%20letal%20media
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