Search Result for "spaying": 
Wordnet 3.0

NOUN (1)

1. neutering a female by removing the ovaries;


The Collaborative International Dictionary of English v.0.48:

Spay \Spay\, v. t. [imp. & p. p. Spayed; p. pr. & vb. n. Spaying.] [Cf. Armor. spac'hein, spaza to geld, W. dyspaddu to geld, L. spado a eunuch, Gr. ?.] To remove or extirpate the ovaries of, as a sow or a bitch; to castrate (a female animal). [1913 Webster]
WordNet (r) 3.0 (2006):

spaying n 1: neutering a female by removing the ovaries