The Collaborative International Dictionary
Bicolligate
Bicolligate \Bi*col"li*gate\,
[L. bis twice + colligatus, p. p. See Colligate, v. t. ] (Zo["o]l.) Having the anterior toes connected by a basal we
Wiktionary
bicolligate
a. (context ornithology English) Having the anterior toes united by a basal web