The Collaborative International Dictionary
Quaternate
Quaternate \Qua*ter"nate\, a. Composed of, or arranged in, sets of four; quaternary; as, quaternate leaves.
Wiktionary
quaternate
a. Composed of, or arranged in, sets of four.
WordNet
quaternate
adj. consisting of or especially arranged in sets of four; "quaternate leaves"; "a quaternary compound" [syn: quaternary]