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rectrix

[rek-triks] /ˈrɛk trɪks/
noun, plural rectrices
[rek-trahy-seez, rek-truh-seez] /rɛkˈtraɪ siz, ˈrɛk trəˌsiz/ (Show IPA).
Ornithology
1.
one of the tail feathers of a bird controlling direction during flight.
Origin
1605-1615
1605-15; < Latin rēctrīx, feminine of rēctor rector
Related forms
rectricial
[rek-trish-uh l] /rɛkˈtrɪʃ əl/ (Show IPA),
adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for rectricial

rectrix

/ˈrɛktrɪks/
noun (pl) rectrices (ˈrɛktrɪˌsiːz; rɛkˈtraɪsiːz)
1.
any of the large stiff feathers of a bird's tail, used in controlling the direction of flight
Derived Forms
rectricial (rɛkˈtrɪʃəl) adjective
Word Origin
C17: from Late Latin, feminine of rector governor, rector
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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