couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad(noun)
two items of the same kind
A set of two different elements.
any set of two different pitch classes.
A pair of things standing in particular relation; dyadic relation.
two units treated as one; a couple; a pair
an element, atom, or radical having a valence or combining power of two
having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen; as, oxygen and calcium are dyad elements. See Valence
Origin: [L. dyas, dyadis, the number two. Gr. : cf. F. dyade. See two, and cf. Duad.]
The Dyad is a title used by the Pythagoreans for the number two, representing the principle of "twoness" or "otherness". Numenius said that Pythagoras gave the name of Monad to God, and the name of Dyad to matter. Aristotle equated matter as the formation of the elements into the material world as the static material was formed by the energies being acted upon by force or motion. Later Neoplatonic Philosophers and idealists like Plotinus treated the dyad as a second cause, which was the divine mind that via a reflective nature causes matter to "appear" or become perceivable.
Chambers 20th Century Dictionary
dī′ad, n. a pair of units treated as one: (chem.) an atom, radical, or element having a combining power of two units: (biol.) a secondary unit of organisation consisting of an aggregate of monads.—adj. Dyad′ic.
The Standard Electrical Dictionary
A chemical term; an element which in combination replaces two monovalent elements; one which has two bonds or is bivalent.
The numerical value of dyad in Chaldean Numerology is: 1
The numerical value of dyad in Pythagorean Numerology is: 7
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