bin-

bin-

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

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Collins
World English Dictionary
bi- or (sometimes before a vowel) bin-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.  a.  denoting an organic compound containing two identical cyclic hydrocarbon systems: biphenyl
 b.  (rare in technical usage) indicating an acid salt of a dibasic acid: sodium bicarbonate
 c.  (not in technical usage) equivalent of di-
 
[from Latin, from bistwice]
 
bin- or (sometimes before a vowel) bin-1
 
combining form
 
[from Latin, from bistwice]

bin-
 
prefix
a variant, esp before a vowel, of bi- : binocular

Collins English Dictionary - Complete & Unabridged 10th Edition
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Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary

bin- pref.
Variant of bi-1.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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