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octad
oc·tad
/
ˈɒk
tæd
/
Show Spelled
[
ok
-tad
]
Show IPA
noun
1.
a group or series of eight.
2.
Chemistry
.
an element, atom, or group having a valence of eight.
Origin:
1835–45;
<
Greek
oktad-
(stem of
oktás
) group of eight, equivalent to
okt-
oct-
+
-ad
-ad
1
Related forms
oc·tad·ic,
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
|
Link To
octad
Collins
World English Dictionary
octad
(ˈɒktæd)
—
n
1.
a group or series of eight
2.
chem
an element or group with a valency of eight
[C19: from Greek
oktās,
from
oktō
eight]
oc'tadic
—
adj
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Relevant Questions
What Is Ordered Octad?
What Is Ordered Octad?
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Octad
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