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avenaceous

American  
[av-uh-ney-shuhs] / ˌæv əˈneɪ ʃəs /

adjective

Botany.
  1. of or like oats.


Etymology

Origin of avenaceous

First recorded in 1765–75; from Latin avēnāceus, equivalent to avēn(a) “oats” + -āceus -aceous