The Collaborative International Dictionary
Synallaxine
Synallaxine \Syn`al*lax"ine\, a. [From Gr. ? to associate with.] (Zo["o]l.) Having the outer and middle toes partially united; -- said of certain birds related to the creepers.
Wiktionary
synallaxine
a. (context zoology English) Having the outer and middle toes partially united; said of certain birds related to the creepers.