Source : Webster's Revised Unabridged Dictionary (1913)

Leguminous \Le*gu"mi*nous\ (-m[i^]*n[u^]s), a. [Cf. F.
   l['e]gumineux.]
   1. Pertaining to pulse; consisting of pulse.

   2. (Bot.) Belonging to, or resembling, a very large natural
      order of plants ({Leguminos[ae]}), which bear legumes,
      including peas, beans, clover, locust trees, acacias, and
      mimosas.

Source : WordNet®

leguminous
     adj : relating to or consisting of legumes