| 单词 | external os |
| 释义 | > as lemmasexternal os More fully external os: the opening of the cervix into the vagina; the os uteri or os externum. Also (in full internal os): the constriction of the cervical canal at its junction with the body of the uterus; the os internum. ΘΚΠ the world > life > biology > physical aspects or shapes > indentation or cavity > [noun] > opening or hole holea1400 vent1567 perforation1578 mouth1634 foramen1672 ostium1683 stoma1684 buttonhole1753 inlet1828 aditus1839 os1858 hiatus1886 1858 A. Farre in Todd's Cycl. Anat. & Physiol. V. 639/1 The epithelium just within the os..is not ciliated. 1872 T. G. Thomas Pract. Treat. Dis. Women (ed. 3) 35 The changes which the os undergoes during pregnancy. 1949 H. W. C. Vines Green's Man. Pathol. (ed. 17) xxxvi. 1017 It [sc. cervical erosion] is a reddened area round the external os, which bleeds rather readily and may be mistaken for cancer. 1971 A. Phillips & J. Rakusen Our Bodies Ourselves (1978) ii. 22 The dimple you felt is the os, or opening into the uterus. It is about the diameter of a very thin straw. 1991 Lancet 9 Mar. 621/1 Central placenta praevia can be diagnosed in early pregnancy, especially when the relation of the placental tissue to the os and the endocervical canal is noted. 2001 Ultrasound in Obstetrics & Gynecol. 17 217 The distance between the internal and external os was measured both as a straight line and also as a curved line along the endocervical canal. < as lemmas |
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