duad

名词 duad:

1. two items of the same kind
   同义词：couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad

du.ad

n.（名词）
A unit of two objects; a pair.
有两个物体的单位；一对

来源：
Greek duas duad- [two]
希腊语 duas duad- [二]
from duo * see dwo-
源自 duo *参见 dwo-