gonys


Also found in: Dictionary, Medical, Wikipedia.

gonys

[′gō·nəs]
(vertebrate zoology)
A ridge along the mid-ventral line of the lower mandible of certain birds.
References in periodicals archive ?
Bill depth at the gonys and head-to-bill length were the best structural measurements separating male and female Caspian Terns (Wilks's [LAMBDA] = 0.
A second discriminant function using only bill depth at the gonys also was successful in classifying gender (Wilks' [LAMBDA] = 0.
Bill depth at the gonys was the most important morphological measurement in classifying gender of Caspian Terns and this variable alone correctly classified 78% of the terns.