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['ɔpʃ(ə)nəl] adj.
chem. à volonté; facultativement
comp. aux choix; au choix
comp., MS facultatif (Pertaining to a component, parameter and so on that is not required or automatic)
IT optionnel
law facultatif
telecom. seulement en cas de nécessité; en option
 English thesaurus
optional ['ɔpʃ(ə)nəl] abbr.
abbr. opsh
abbr., polym. opt.
Optional ['ɔpʃ(ə)nəl] abbr.
abbr., insur. o/p
mil., abbr. O
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: 187 phrases in 42 subjects
Agriculture3 General23 Patents5
Automated equipment1 Grammar1 Pharmacy and pharmacology1
Aviation1 Gymnastics1 Phonology2
Commerce5 Health care2 Politics1
Communications7 Human rights activism10 Rail transport1
Computers7 Information technology15 Social science1
Construction3 Insurance5 Statistics4
Corporate governance1 International Monetary Fund2 Tagmemics1
Economics3 Law21 Taxes1
Education3 Linguistics3 Technology1
Electronics3 Marketing1 Transport10
Finances21 Microsoft4 United Nations5
Food service and catering1 Name of organization1 Welfare & Social Security2
Football1 Natural resourses and wildlife conservation1 Work flow2