Source : Webster's Revised Unabridged Dictionary (1913)

Aroid \Ar"oid\, n. [Arum + -oid.] (Bot.)
   Any plant of the Arum family ({Arace[ae]}).

Aroid \A"roid\, Aroideous \A*roid"e*ous\, a. [Arum + -oid.]
   (Bot.)
   Belonging to, or resembling, the Arum family of plants.

Source : WordNet®

aroid
     adj : relating to a plant of the family Araceae [syn: {araceous}]
     n : any plant of the family Araceae; have small flowers massed
         on a spadix surrounded by a large spathe [syn: {arum}]