Definition of quaternate in US English:

quaternate

adjective

Botany
  • Arranged in, or forming, a set or sets of four; composed of four parts.

Origin

Mid 18th century; earliest use found in Chambers's Cyclopaedia. From post-classical Latin quaternatus from classical Latin quaternī + -ātus. Compare French quaterné.

Pronunciation

quaternate

/kwəˈtəːnət/