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oct-

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variant of octa- or octo- before a vowel: octal.
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Other definitions for oct- (2 of 3)

oct.

abbreviation
octavo.

Other definitions for oct- (3 of 3)

Oct.

abbreviation
October.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use oct- in a sentence

British Dictionary definitions for oct- (1 of 2)

Oct

abbreviation for
October

British Dictionary definitions for oct- (2 of 2)

oct-

combining form
(used before a vowel) a variant of octo-
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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