Science Dictionary
altricial   (āl-trĭsh'əl)  Pronunciation Key 
Born or hatched in a helpless condition requiring prolonged parental care, as by being naked, blind, or unable to move about. Nesting birds, monotremes, marsupials, and carnivores have altricial young. Compare precocial.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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