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单词 extorsion
释义

extorsionn.

/ɛkˈstɔːʃən/
Etymology: < Latin extorsiōn-em (see extortion n.).
Outward rotation of a part of the body, esp. of the eye.
ΘΚΠ
the world > life > the body > external parts of body > head > face > eye > [noun] > movements of eye
rollinga1500
volubility1603
flexion1626
roving1658
eye-rolling1837
run1837
sursumversion1897
extorsion1899
vergence1902
eye-roll1928
1899 A. Duane tr. E. Fuchs Text-bk. Ophthalmol. (ed. 2) xiv. 578 The inferior rectus..rotates the eye in such a way that the upper extremity of the vertical meridian is depressed to the outside (extorsion).
1964 S. Duke-Elder Parsons' Dis. Eye (ed. 14) xxviii. 446 An involuntary movement of torsion: intorsion when the upper pole of the cornea rotates nasally, extorsion when temporally.
This entry has not yet been fully updated (first published 1972; most recently modified version published online June 2018).
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n.1899
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