ectocingulid

noun2

1. •
   A cingulid on the exterior of a tooth
2. •
   A thin ridge on the buccal (labial) aspect of lower molar crowns, typically enveloping the hypoflexid

   • The buccal wall is near its base surrounded by a vestigial ectocingulid, which ends mesially in a tiny tuberculid. — 2015