amygdalin

from WordNet (r) 3.0 (2006)

amygdalin
    n 1: a bitter cyanogenic glucoside extracted from the seeds of
         apricots and plums and bitter almonds

from The Collaborative International Dictionary of English v.0.48

amygdalin \a*myg"da*lin\ ([.a]*m[i^]g"d[.a]*l[i^]n), n. (Chem.)
   A glucoside extracted from bitter almonds as a white,
   crystalline substance.
   [1913 Webster]