Medical dictionary. 2011.
ostium histologicum uteri internum — [TA] histological internal os of uterus: the histological lower limit of the isthmus uteri, which is the level of transition between endometrium undergoing menstrual changes above and cervical mucosa not undergoing such changes below; it may not… … Medical dictionary
ostium uteri internum — internal os of uterus: the internal orifice of the cervix of the uterus, opening into the cavity of the uterus. The official nomenclature distinguishes the anatomical internal os (o. anatomicum uteri internum, [TA]) from the histological internal … Medical dictionary
ostium — A small opening, especially one of entrance into a hollow organ or canal. SEE ALSO: orifice, opening, os, mouth (2). [L. door, entrance, mouth] o. abdominale tubae uterinae [TA] SYN: abdominal o. of uterine tube … Medical dictionary
internal os of uterus anatomical — ostium anatomicum uteri internum … Medical dictionary
os — 1. [NA] The mouth. 2. Term applied sometimes to an opening into a hollow organ or canal, especially one with thick or fleshy edges. SEE ALSO: mouth (2), ostium, orifice, opening. [L. mouth] … Medical dictionary
