monocotyledonous

from WordNet (r) 3.0 (2006)

monocotyledonous
    adj 1: (of a flowering plant) having a single cotyledon in the
           seed as in grasses and lilies [ant: {dicotyledonous}]

from The Collaborative International Dictionary of English v.0.48

Monocotyledonous \Mon`o*cot`y*le"don*ous\, a. [Cf. F.
   monocotyl['e]don['e].] (Bot.)
   Having only one cotyledon, seed lobe, or seminal leaf.
   --Lindley.
   [1913 Webster]

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