Webster's English Dictionary

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pupa

pu.pa \'pyu:-p*\ \-(.)pe-, -.pi-\ \'pyu:-.p*l\ n or pu.pae or pupas [NL, 
   fr. L pupa girl, doll] pl  : a metamorphic insect in an intermediate usu. 
   quiescent form assumed betw een the larval and the imaginal stages and 
   characterized by internal dedifferentiation of larva structures and their 
   replacement by structures typical of the imago - pu.pal aj