proclivous

adjective2

1. •
   Directing forward or (specifically) having the incisors directed forward.

   • [bandicoots have] the upper incisors being small, with short, broad crowns; the lower incisors moderate, narrow, proclivous; canines well developed. — 1911
2. •
   (no longer used) inclined towards something; tending by nature

   • the Negro is proclivous to various inflammatory diseases of the respiratory organs — 1875