altricial

[al-trish-uhl]

al·tri·cial

[al-trish-uhl]
adjective Zoology. (of an animal species)
helpless at birth or hatching and requiring parental care for a period of time (opposed to precocial.)

Origin:
1870–75; < Latin altrīc-, stem of altrīx wet nurse, nourisher (al(ere) to nourish (compare aliment) + -trīx -trix) + -al1
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Altricial is always a great word to know.
So is mammal. Does it mean:
phylum of worms with bilateral symmetry and soft, usually flattened bodies
vertebrate with body hair that nourishes young with milk from mammary glands
Collins
World English Dictionary
altricial (ælˈtrɪʃəl)
 
adj
1.  (of the young of some species of birds after hatching) naked, blind, and dependent on the parents for food
 
n
2.  an altricial bird, such as a pigeon
 
[C19: from New Latin altriciālis, from Latin altrix a nurse, from alere to nourish]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
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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