bi-, bin-, bino-, bis-
(Latin: two, twice, double, twofold; a number; it normally functions as a prefix)
This bi- is used before s, c, or a vowel. Don't confuse this bi- with another one which means "life".
All words except biennial referring to periods of time and prefixed by bi- are potentially ambiguous. Since bi- can be taken to mean either "twice each" or "every two", a word like "biweekly" can be understood as "twice each week" or "every two weeks".
bihourly
Occurring every two hours.
bilabial
bilateral
1. In politics, involving or carried out by two groups; especially, the political representatives of two countries.
2. Relating to or affecting both of two sides; bilateralism, bilaterally.
3. Arranged symmetrically on opposite sides of an axis.
bilateralism
bilaterally
bilinear
bilingual
1. The ability to speak two languages easily and naturally.
2. Written, expressed, or conducted in two languages; such as, a bilingual dictionary.
3. Having or using two languages; such as, a bilingual nation.
billion
bimanual
1. Involving or requiring the use of both hands.
2. Relating to, done with, or performed by, both hands.
bimanually
bimestrial, bimester
1. Lasting two months.
2. Occurring every two months; bimonthly.
3. A two-month period.
bimetallic
bimetallism
The practice of using two metals; such as, gold and silver, as the basis of money in a country.
bimillennium
bimonthly
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