'Spurious wing' definitions:

Definition of 'spurious wing'

noun

Tuft of small stiff feathers on the first digit of a bird's wing [syn: bastard wing, alula, spurious wing]

From: GCIDE

Spurious \Spu"ri*ous\ (sp[=u]"r[i^]*[u^]s), a. [L. spurius.]
1. Not proceeding from the true source, or from the source pretended; not genuine; counterfeit; false; adulterate. [1913 Webster]
2. Not legitimate; bastard; as, spurious issue. "Her spurious firstborn." --Milton. [1913 Webster]
Spurious primary, or Spurious quill (Zool.), the first, or outer, primary quill when rudimentary or much reduced in size, as in certain singing birds.
Spurious wing (Zool.), the bastard wing, or alula. [1913 Webster]
Syn: Counterfeit; false; adulterate; supposititious; fictitious; bastard. [1913 Webster] -- {Spu"ri*ous*ly}, adv. -- {Spu"ri*ous*ness}, n. [1913 Webster]