pyramidalis
/ˌpɪramɪˈdɑːlɪs/Anatomy and Zoology
noun
More fully pyramidalis muscle. Any of several muscles that are more or less triangular in shape; ( Anatomy ) a muscle of the lower abdominal wall which arises from the pubic bone and inserts into and exerts tension on the linea alba, and (more fully pyramidalis nasi) the procerus muscle (now rare ).
Origin
Early 17th century; earliest use found in Helkiah Crooke (1576–1648), physician and anatomist. From post-classical Latin pyramidalis pyramidalis muscle, use as noun of pyramidalis pyramidal.