> as lemmas

1746 Philos. Trans. (Royal Soc.) 44 29 The Risorius is a flat Bundle of Fibres, which arises near the Angle of the Jaw from the Skin of the parotid Gland.

1835 Christian Examiner & Gen. Rev. Nov. 262 Mirth moves the diaphragm and the risorius muscle, and grief acts on the abdomen and lachrymal glands.

1867 Quain's Elements Anat. (ed. 7) I. 176 The risorius or smiling muscle (Santorini), consisting of some very thin fasciculi,..joins the orbicularis and depressor anguli oris at the angle of the mouth.

1902 D. J. Cunningham Text-bk. Anat. 377 The risorius is a thin flat muscle which forms partly a continuation of the platysma myoides on the face, partly a separate muscle, with an origin from the masseteric fascia.

1936 A. Huxley Eyeless in Gaza xviii. 233 The whole mechanism of the excruciating grimace, the upward and outward pull of the zygomaticus major, the sideways tug of the risorius.

1961 L. F. Brosnahan Sounds of Lang. iv. 80 This suggests again a cline in gene frequency, the decrease in the mean height running in the same direction through the African–European–Asiatic population as the increase in the frequency of the occurrence of the risorius muscle in the face.

2005 Daily Tel. 17 Jan. 18/6 They had a group of subjects look at cartoons, either while holding a pen between their lips—an action that made it impossible to contract either of the two major smiling muscles, the risorius and the zygomatic major—or while holding a pen clenched between their teeth, which had the opposite effect and forced them to smile.