Webster's English Dictionary

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altricial

Cross references:
  1. precocial             
 
al.tri.cial \al-'trish-*l\ aj [L altric-, altrix fem. of altor one who 
   nourishes, fr. al]tus pp. of alere to nourish - more at OLD : having the 
   young hatched in a very immature and helpless condition so as to require 
   care for some time