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Index A
- a
- a- (1)
- a- (2)
- AB
- ab-
- abbreviations: acronyms and initialisms
- abbreviations: ampersand
- abbreviations: business terms and symbols
- abbreviations: capitals and hyphens
- abbreviations: corporate names
- abbreviations: days and months
- abbreviations: degrees and distinctions
- abbreviations: general guidelines
- abbreviations: geographical names
- abbreviations: imperial system
- abbreviations: International System of Units (SI)
- abbreviations: latitude and longitude
- abbreviations: military abbreviations
- abbreviations: monetary units
- abbreviations: netspeak
- abbreviations: number symbols
- abbreviations: parts of a book or document
- abbreviations: periods
- abbreviations: plurals
- abbreviations: scientific and technical terms
- abbreviations: time zones
- abbreviations: titles with personal names
- abeyance
- abide
- abide by
- about
- above-mentioned
- abreast
- absolutely essential
- absolute phrases
- abstain
- abstain from
- abstain in
- abstain on
- accede to
- accordance
- according to
- according to our records
- accord (of one’s own)
- accountable for
- accountable to
- accuracy
- accurate
- acquiesce in
- acquiesce to
- acquiesce with
- action verbs
- active voice
- act on
- act upon
- acu-
- addresses: official languages
- addresses on envelopes and parcels (Linguistic recommendation from the Translation Bureau)
- adequate amount of
- adequate number of
- adjective
- adjective clause
- adjective comparison
- ADT
- adverb clause
- adverb comparison
- adverbs
- adverse
- adverse to
- advice
- advise
- aero-
- a few
- affect
- Afghan
- afghani
- aforementioned
- Afro-
- after
- again
- ageing
- agenda
- agendas
- aggravate
- aging
- agreeable
- agree on
- agree to
- agree with
- agro-
- Alberta
- Albertan
- alliteration
- allo-
- all over again
- allow for
- allow to
- all ready
- all right
- all-time record
- all together
- allude
- allusion
- almost without exception
- along these lines
- already
- alright
- Alta.
- alternate(ly)
- alternative(ly)
- altogether
- alumna
- alumnus
- a.m.
- a mari usque ad mare
- ambi-
- American dollar (symbol) (Linguistic recommendation from the Translation Bureau)
- Americo-
- amount
- an-
- an
- an abundance of
- analyse
- analyze
- and
- and/or
- and so as a result
- Anglo-
- Anglophone
- anniversary
- answer for
- answer to
- ante-
- anti-
- anticipate
- anxious about
- anxious at
- anxious for
- anxious to
- any
- apostrophe: contractions
- apostrophe: plurals
- apostrophe: possession
- apparent
- appear
- appositives
- appraise
- apprise
- approval of
- approval to
- approve
- approve of
- approximately
- approximately about
- apt
- aqua-
- aqui-
- Arabo-
- arch-
- Armeno-
- Armistice Day
- around (1)
- around (2)
- as a consequence of
- as a matter of fact
- as a result of
- as a result of the fact that
- ascend
- ascent
- as far as
- aspire after
- aspire to
- as regards
- assent
- associate to
- associate with
- as soon as
- assume
- assure
- AST
- asterisk at end of sentence
- astro-
- as well as
- Atlantic Daylight Time
- Atlantic provinces
- Atlantic Standard Time
- attention
- attentive
- attentiveness
- at that point in time
- at the present time
- at this point in time
- at variance among
- at variance with
- audit and derived terms (Linguistic recommendation from the Translation Bureau)
- Austro-
- authentic
- autumn
- auxiliary verbs
- avenge
- averse to
- avocation
- awards
- aware of
- Azerbaijani
- Azeri
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abbreviations: general guidelines
The use of abbreviations has gained greater acceptance as an increasing number of new products and organizations are identified by shorter and more easily recognizable word forms.
If you are in doubt about the correct abbreviation for a term, use the long form.
In using abbreviations, follow the general rules set out below.
Unfamiliar abbreviations
Abbreviations (shortened forms of full terms) may not be familiar to all readers. For clarity, write out the full term the first time you mention it, and put the abbreviation in parentheses after the name.
- Canadian Spac Agency (CSA)
- Royal Ontario Museum (ROM)
Once you have given the abbreviation in parentheses, ensure that you use the same abbreviation elsewhere in your text to represent the word or words involved.
Well-known abbreviations
If the abbreviation is better known than the full term, you should write the abbreviation first and put the full name in brackets after it at first mention.
- Unesco (United Nations Educational, Scientific, and Cultural Organization)
Common abbreviations often in the news need not be spelled out if the full term is rarely used or is difficult to pronounce.
- RCMP Royal Canadian Mounted Police
- 3M Minnesota Mining and Manufacturing Company
- DNA deoxyribonucleic acid
- HIV human immunodeficiency virus
In addition, some standard abbreviations (such as i.e., AD, IQ, ESP, CBC and MP) do not have to be spelled out because they are well known and in many cases occur as dictionary entries.
Informal abbreviations
Many commonly used words that are actually abbreviations are now rarely regarded as such, including ad, fridge, phone, exam, memo, photo and math.
Most such words should be avoided in formal writing, although cello and bus are exceptions to this rule.
Abbreviations in tables or lists
If space is limited—for example, in a table or list—using just the abbreviation may be the better choice, but remember to explain it somewhere else in your document.
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