from The American Heritage® Dictionary of the English Language, 4th Edition
- Two: biform.
- Both: binaural.
- Both sides, parts, or directions: biconcave.
- Occurring at intervals of two: bicentennial.
- Usage Problem Occurring twice during: biweekly.
- Containing twice the proportion of a specified chemical element or group necessary for stability: bicarbonate.
- Containing two chemical atoms, radicals, or groups: biphenyl.
- Variant of bio-.
from Wiktionary, Creative Commons Attribution/Share-Alike License
from the GNU version of the Collaborative International Dictionary of English
- In most branches of science bi- in composition denotes two, twice, or doubly
- In the composition of chemical names bi- denotes two atoms, parts, or equivalents of that constituent to the name of which it is prefixed, to one of the other component, or that such constituent is present in double the ordinary proportion. Be- and di- are often used interchangeably.
from The Century Dictionary and Cyclopedia
- A common Middle English form of the preposition by.
- The chemical symbol of bismuth.
- A Middle English and Anglo-Saxon form of be- or be-.
- A prefix of Latin origin, cognate with di- and twi-, meaning two, two-, twice, double, twofold, as in biaxial, bicornous, bimanous, biped, bifurcate, etc.: especially in chemical terms, where it denotes two parts or equivalents of the ingredient referred to, as in bicarbonate, bichromate, etc.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals
Latin bis, bi-, twice, and bīnī, two by two; see dwo- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin bis ("twice"). (Wiktionary)