The Collaborative International Dictionary
Metagnathous
Metagnathous \Me*tag"na*thous\, a. [Pref. meta- + Gr. gna`qos the jaw.] (Zo["o]l.) Cross-billed; -- said of certain birds, as the crossbill.
Wiktionary
metagnathous
a. (context zoology English) having the mandibles crossing at the tip of the bill, as in the crossbill