adjective, noun, plural bis, bi’s.
- Slang. bisexual.
- a combining form meaning “twice,” “two,” used in the formation of compound words: bifacial; bifarious.
- variant of bio-, especially before a vowel: biopsy.
the internet domain name for
the chemical symbol for
- two; having twobifocal
- occurring every two; lasting for twobiennial
- on both sides, surfaces, directions, etcbilateral
- occurring twice duringbiweekly
- denoting an organic compound containing two identical cyclic hydrocarbon systemsbiphenyl
- (rare in technical usage) indicating an acid salt of a dibasic acidsodium bicarbonate
- (not in technical usage) equivalent of di- 1 (def. 2a)
- a variant of bio-
1956 as a colloquial abbreviation of bisexual.
word-forming element meaning “two, twice, double, doubly, once every two,” etc., from Latin bi- “twice, double,” from Old Latin dvi- (cognate with Sanskrit dvi-, Greek di-, Old English twi- “twice, double”), from PIE root *dwo- “two.” Nativized from 16c. Occasionally bin- before vowels; this form originated in French, not Latin, and might be partly based on or influenced by Latin bini “twofold” (see binary).
- The symbol for the elementbismuth
- The symbol for bismuth.
- A brittle, pinkish-white, crystalline metallic element that occurs in nature as a free metal and in various ores. Bismuth is the most strongly diamagnetic element and has the highest atomic number of all stable elements. It is used to make low-melting alloys for fire-safety devices. Atomic number 83; atomic weight 208.98; melting point 271.3°C; boiling point 1,560°C; specific gravity 9.747; valence 3, 5. See Periodic Table.