octa-

octa-

a combining form occurring in loanwords from Greek and Latin, where it meant “eight” (octagon; octastyle ), on this model, used in the formation of compound words, and in chemical terms specialized to mean “having eight atoms” (octavalent ).
Also, oct-, octo-.

Origin:
< Greek okta-, combining form of oktṓ eight

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octa-
 
—combining form
a variant of octo-

00:10
Octa- is always a great word to know.
So is bezoar. Does it mean:
a gadget; dingus; thingumbob.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
octo-, (before a vowel) octa- or (before a vowel) oct-
 
—combining form
eight: octosyllabic; octagon
 
[from Latin octo, Greek okto]
 
octa-, (before a vowel) octa- or (before a vowel) oct-
 
—combining form
 
[from Latin octo, Greek okto]
 
oct-, (before a vowel) octa- or (before a vowel) oct-
 
—combining form
 
[from Latin octo, Greek okto]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

octa-
prefix meaning "eight," from L. octo, Gk. okto-, cognate with Skt. asta, Goth. ahtau, O.E. eahta (see eight).
Online Etymology Dictionary, © 2010 Douglas Harper
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