risoriusn.

Brit.

/rɪˈzɔːrɪəs/,

/rɪˈsɔːrɪəs/, U.S.

/rɪˈzɔriəs/,

/rɪˈsɔriəs/

Origin: A borrowing from Latin. Etymons: Latin risorius, musculus risorius.

Etymology: < post-classical Latin risorius (in musculus risorius: J. D. Santorini Observationes anatomicæ (1724) i. 33) < post-classical Latin risorius ridiculous (6th cent.), laughing (13th cent.) < classical Latin rīsor laugher ( < rīs- , past participial stem of rīdēre to laugh (see rident adj.) + -or -or suffix) + -ius, suffix forming adjectives. Compare French risorius de Santorini (1765), risorius (1803 as adjective).

Anatomy.

More fully risorius muscle. A flat muscle originating from the fascia of the masseter muscle and inserting into the corner of the mouth, which it draws laterally, as in smiling.The risorius is variable in size and form and is sometimes absent.

ΘΚΠ

the world > life > the body > structural parts > muscle > muscles of specific parts > [noun] > muscles of mouth or lips

genioglossus1615

myloglossus1657

mylohyoideus1657

geniogloss1661

styloglossum1671

orbicularis1681

styloglossus1728

risorius1746

palatopharyngeus1749

orbicularis oris1754

hyoglossus1811

palatoglossus1828

mylohyoid muscle1838

mylohyoid1844

stylohyoid1897

genioglossals1900

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.

This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).

单词	risorius
释义	risoriusn. Brit. /rɪˈzɔːrɪəs/, /rɪˈsɔːrɪəs/, U.S. /rɪˈzɔriəs/, /rɪˈsɔriəs/ Origin: A borrowing from Latin. Etymons: Latin risorius, musculus risorius. Etymology: < post-classical Latin risorius (in musculus risorius: J. D. Santorini Observationes anatomicæ (1724) i. 33) < post-classical Latin risorius ridiculous (6th cent.), laughing (13th cent.) < classical Latin rīsor laugher ( < rīs- , past participial stem of rīdēre to laugh (see rident adj.) + -or -or suffix) + -ius, suffix forming adjectives. Compare French risorius de Santorini (1765), risorius (1803 as adjective). Anatomy. More fully risorius muscle. A flat muscle originating from the fascia of the masseter muscle and inserting into the corner of the mouth, which it draws laterally, as in smiling.The risorius is variable in size and form and is sometimes absent. ΘΚΠ the world > life > the body > structural parts > muscle > muscles of specific parts > [noun] > muscles of mouth or lips genioglossus1615 myloglossus1657 mylohyoideus1657 geniogloss1661 styloglossum1671 orbicularis1681 styloglossus1728 risorius1746 palatopharyngeus1749 orbicularis oris1754 hyoglossus1811 palatoglossus1828 mylohyoid muscle1838 mylohyoid1844 stylohyoid1897 genioglossals1900 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. This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022). < n.1746
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