Source : Webster's Revised Unabridged Dictionary (1913)

Cucurbitaceous \Cu*cur`bi*ta"ceous\ (-b[i^]*t[=a]"sh[u^]s), a.
   [Cf. F. cucurbitac['e].] (Bot.)
   Of, pertaining to, or resembling, a family of plants of which
   the cucumber, melon, and gourd are common examples.

Source : WordNet®

cucurbitaceous
     adj : of or relating to plants of the family Cucurbitaceae