What is "acerous"

Acerous \Ac"er*ous\, a. Same as Acerose.

Acerous \Ac"er*ous\, a. [Gr. [alpha] priv. + ke`ras a horn.] (Zo["o]l.)

1. Destitute of tentacles, as certain mollusks.

2. Without antenn[ae], as some insects.

Etymology 1 a. (alternative spelling of acerose English) Etymology 2

a. 1 (context zoology English) Destitute of tentacles, as certain mollusks 2 (context zoology English) Without antennae, as some insects