dicotyledonous

from WordNet (r) 3.0 (2006)

dicotyledonous
    adj 1: (of a flowering plant) having two cotyledons in the seed
           [ant: {monocotyledonous}]

from The Collaborative International Dictionary of English v.0.48

dicotyledonous \di*cot`y*led"on*ous\
   (d[-i]*k[o^]t`[i^]*l[e^]d"[u^]n*[u^]s), a. (Bot.)
   Having two cotyledons or seed lobes; as, a dicotyledonous
   plant. Dicrotal