principal meridians: Two mutually perpendicular meridians of an astigmatic power ocular or lens that are parallel to the two line foci. 1, record 1, English, - principal%20meridian
Record number: 1, Textual support number: 1
OBS
principal meridian: The plural form of this term (principal meridians) and the plural definition have been standardized by the International Organization for Standardization (ISO). 2, record 1, English, - principal%20meridian
correct, see observation, masculine noun, standardized
Record 1,
Abbreviations,
French
Record 1,
Synonyms,
French
Record 1,
Textual support,
French
Record number: 1, Textual support number: 1
DEF
méridiens principaux : Deux méridiens mutuellement perpendiculaires d'un oculaire ou d'un verre astigmatique qui sont parallèles aux deux lignes focales. 1, record 1, French, - m%C3%A9ridien%20principal
Record number: 1, Textual support number: 1
OBS
méridien principal : Le terme au pluriel (méridiens principaux) et la définition au pluriel ont été normalisés par l'Organisation internationale de normalisation (ISO). 2, record 1, French, - m%C3%A9ridien%20principal
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