word-forming element meaning "twice," from Latin bis "twice, in 2 means, doubly," from Old Latin dvis, cognate with Sanskrit dvih, Avestan bish, Greek dis, Middle tall German zwis "twice," from PIE *dwo- "two" (see two). Also the form of bi- used before -s-, -c-, or a vowel.
a type of Bi-, often used before s, c, or a vowel.
(pref.) A kind of Bi-, occasionally used before s, c, or a vowel.