octad(redirected from octadic)
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Related to octadic: octonary
A group or sequence of eight.
1. (Mathematics) a group or series of eight
2. (Chemistry) chem an element or group with a valency of eight
[C19: from Greek oktās, from oktō eight]
1. a group or series of eight.
2. an element, atom, or group having a valence of eight.