bin-
1.
a combining form meaning “two,” “two at a time,” used in the formation of compound words:
binary; binocular.
Compare
bi-
1
.
Origin
combining form of
Latin
bīnī
two each, by twos
British Dictionary definitions for
bin-
bi-
1
combining form
1.
two; having two:
bifocal
2.
occurring every two; lasting for two:
biennial
3.
on both sides, surfaces, directions, etc:
bilateral
4.
occurring twice during:
biweekly
5.
denoting an organic compound containing two identical cyclic hydrocarbon systems:
biphenyl
(rare in technical usage) indicating an acid salt of a dibasic acid:
sodium bicarbonate
(not in technical usage) equivalent of
di-
1
(sense 2a)
Word Origin
from Latin, from
bis
twice
bin-
prefix
1.
a variant, esp before a vowel, of
bi-
1
binocular
bin-
in Medicine
bin-
pref.
Variant of
bi-
1
.