A BIANNUAL event occurs twice a year; a BIENNIAL event takes place once in two years.
A BICAMERAL government has two legislative branches or chambers, like the House and Senate of the United States.
One's BICEPS is a muscle having two heads or points of attachment.
One's BICUSPIDS are teeth with two points.
If you are BILINGUAL, you can speak two languages.
BINOCULARS are field glasses adapted to the use of both eyes, in contrast with the telescope, which is a monocular instrument.
To BISECT is to cut into two parts.
An oyster is a BIVALVE because it has a two-valved shell.
BIFOCALS are eyeglasses made with double lenses of different focuses so that the wearer may have one focus for distant vision and one for reading.
BIMETALLISM is the practice of using two metals; such as, gold and silver, as the basis of money in a country.
Also: bicentennial, bilateral, bimonthly, biplane, biped.
