Dyad

[daiæd]

解释:

(n.) Two units treated as one; a couple; a pair.

(n.) An element, atom, or radical having a valence or combining power of two.

(a.) 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.

芭比整理

解释:

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.

校对:米里亚姆