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The Collaborative International Dictionary
Amentaceous

Amentaceous \Am`en*ta"ceous\, a. [LL. amentaceus.] (Bot.)

  1. Resembling, or consisting of, an ament or aments; as, the chestnut has an amentaceous inflorescence.

  2. Bearing aments; having flowers arranged in aments; as, amentaceous plants. [1913 Webster] ||

Wiktionary
amentaceous

a. (context botany English) Bearing, resembling, or consisting of an ament or aments.

WordNet
amentaceous

adj. (of plants) bearing or characterized by aments or catkins [syn: amentiferous]