[1] : The Collaborative International Dictionary of English v.0.48

darnel \dar"nel\ da^r"ne^l, n. oe. darnel, dernel, of
   uncertain origin; cf. dial. f. darnelle, sw. dar-repe;
   perh. named from a supposed intoxicating quality of the
   plant, and akin to sw. dara to infatuate, od. door
   foolish, g. thor fool, and ee. dizzy. bot.
   any grass of the genus lolium, esp. the lolium temulentum
   bearded darnel, the grains of which have been reputed
   poisonous. other species, as lolium perenne rye grass or
   ray grass, and its variety lolium italicum italian rye
   grass, are highly esteemed for pasture and for making hay.
   1913 webster

   note: under darnel our early herbalists comprehended all
         kinds of cornfield weeds. --dr. prior.
         1913 webster
see also:
lolium lolium temulentum lolium perenne lolium italicum 

[2] : WordNet (r) 2.0

darnel
     n : weedy annual grass often occurs in grainfields and other
         cultivated land; seeds sometimes considered poisonous
         syn: tare, bearded darnel, cheat, lolium
         temulentum
see also:
tare bearded darnel cheat lolium temulentum 

Darnel >> D Words
Darnel, definition of term: Darnel
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