Definition of amentaceous in English:

amentaceous

Pronunciation /ˌamənˈteɪʃəs/ /ˌeɪmənˈteɪʃəs/

adjective

Botany
  • 1Of the nature of a catkin (or, in early use, catkin-like inflorescence).

  • 2Of a plant: bearing catkins, amentiferous; (also) belonging to a family (or other group) of plants that bear catkins (now historical).

Origin

Early 18th century. From post-classical Latin amentaceus like a winter bud, of the nature of a catkin, (of a plant) bearing catkins + -ous.