The Collaborative International Dictionary
Proclivous
Proclivous \Pro*cli"vous\, a. [L. proclivus. See Proclive.]
Inclined; tending by nature. [R.]
(Zo["o]l.) Having the incisor teeth directed forward.
Wiktionary
proclivous
a. 1 inclined towards something; tending by nature 2 (context zoology English) Having the incisor teeth directed forward.