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impennate

British  
/ ɪmˈpɛneɪt /

adjective

  1. rare (of birds) lacking true functional wings or feathers

"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

Example Sentences

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Impennate, im-pen′āt, Impennous, im-pen′us, adj. wingless: having very short wings useless for flight.

From Project Gutenberg