Dictionary.net

• [Latin] Muscle from canine fossa to angle of mouth; levator anguli oris.

1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth

• Levator anguli oris-c. Sentis, Rosa canina-c. Spasmus, see Canine Laugh.

1846 - Medical lexicon: a dictionary of medical science
By Robley Dunglison