flehmen

noun
  1. A facial response in which an animal curls its upper lip and inhales to draw scent particles into the vomeronasal organ; the behavior itself.
  2. Usage: ethology term; also called flehmen response
verb
  1. To perform the flehmen response; to curl the upper lip and inhale to detect scents.
  2. Usage: ethology term; intransitive

Examples