[приставка, первая часть сложных слов, латинский язык] дву(х)-, двое-, обое-, двояко-, би- Например: binational — двустронний (с участием двух государств) bilingual dictionary — двуязычный словарь biconcave — двояковогнутый bisexual — бисексуальный Синоним(ы): di-, two-
I. prefix Etymology: Middle English, from Latin — more at twi- 1. a. two Example: bilateral b. coming or occurring every two Example: bicentennial c. into two parts Example: bisect 2. a. twice; doubly; on both sides Example: biconvex b. coming or occurring two times Example: biannual — compare semi- 3. between, involving, or affecting two (specified) symmetrical parts Example: bilabial 4. a. containing one (specified) constituent in double the proportion of the other constituent or in double the ordinary proportion Example: bicarbonate b. di- 2 Example: biphenyl Usage: Many people are puzzled about bimonthly and biweekly, which are often ambiguous because they are formed from both senses 1b and 2b of bi-. This ambiguity has been in existence for nearly a century and a half and cannot be eliminated by the dictionary. The chief difficulty is that many users of these words assume that others know exactly what they mean, and they do not bother to make their context clear. So if you need bimonthly or biweekly, you should leave some clues in your context to the sense of bi- you mean. And if you need the meaning “twice a,” you can substitute semi- for bi-. Biannual and biennial are usually differentiated. II. combining form or bio- Etymology: Greek, from bios mode of life — more at quick 1. life; living organisms or tissue Example: bioluminescence Example: biosphere 2. biographical Example: biopic