Dyad
Origin
From Ancient Greek δÏας, δÏαδ- from Ancient Greek δÏο from Ancient Greek δÏο, from Proto-Indo-European *duwó,*duwéh₃ (*dwóhâ‚).
American Heritage 2000
Full definition of dyad
Noun
dyad
(plural dyads)- A set of two elements treated as one; a pair.
- 1908, W. D. Ross, S:Metaphysics/Book I, ... positing a dyad and constructing the infinite out of great and small, instead of treating the infinite as one, is peculiar to him; ...
- (music) any set of two different pitch classes.
- A pair of things standing in particular relation; dyadic relation.
- "For each individual in a specific dyad (i.e., mother-offspring, offspring-father, sibling-sibling),..." Debra Lieberman, John Tooby, and Leda Cosmides - The evolution of human incest avoidance mechanisms: an evolutionary psychological approach, p. 20
- (chemistry) An element, atom, or radical having a valence or combining power of two.