[ ok-tad ]
/ ˈɒk tæd /
a group or series of eight.
Chemistry. an element, atom, or group having a valence of eight.
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Origin of octad
OTHER WORDS FROM octadoc·tad·ic, adjective
Words nearby octad
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for octad
/ (ˈɒktæd) /
a group or series of eight
chem an element or group with a valency of eight
Derived forms of octadoctadic, adjective
Word Origin for octad
C19: from Greek oktās, from oktō eight
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