Source : Webster's Revised Unabridged Dictionary (1913)

Anapaest \An`a*p[ae]st\, Anapaestic \An`a*p[ae]s"tic\
   Same as {Anapest}, {Anapestic}.

Source : WordNet®

anapaest
     n : a metrical unit with unstressed-unstressed-stressed
         syllables [syn: {anapest}]