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ostiumenUK
os·ti·um O0144300 (ŏs′tē-əm)n. pl. os·ti·a (-tē-ə) 1. A small opening or orifice, as in a body organ or passage.2. Any of the small openings or pores in a sponge, through which water is drawn in.
[Latin ōstium, door, opening, from ōs, mouth; see ōs- in Indo-European roots.]ostium (ˈɒstɪəm) n, pl -tia (-tɪə) 1. (Zoology) any of the pores in sponges through which water enters the body2. (Zoology) any of the openings in the heart of an arthropod through which blood enters3. (Biology) any similar opening[C17: from Latin: door, entrance]os•ti•um (ˈɒs ti əm)
n., pl. -ti•a (-ti ə) a small opening or orifice of the body. [1655–65; < Latin ōstium entrance, river mouth] TranslationsostiumenUK
ostium[′äs·tē·əm] (biology) A mouth, entrance, or aperture. ostiumenUK
ostium [os´te-um] (L.) an opening" >opening or orifice" >orifice. adj., adj os´tial.ostium abdomina´le the fimbriated end of the fallopian tube.ostium cardi´acum the orifice between the esophagus and the stomach.coronary ostium either of the two openings in the aortic sinuses that mark the origins of the left and right coronary arteries.ostium inter´num ostium uterinum tubae.ostium pharyn´geum the nasopharyngeal end of the eustachian tube.ostium pri´mum an opening in the lower portion of the membrane dividing the embryonic heart into right and left sides. See also atrial septal defect and congenital heart defect.ostium secun´dum an opening in the upper portion of the membrane dividing the embryonic heart into right and left sides, appearing later than the ostium primum. See also atrial septal defect and congenital heart defect.)tympanic ostium (ostium tympa´nicum) the opening of the eustachian tube on the carotid wall of the tympanic cavity.ostium u´teri the external opening of the cervix of the uterus into the vagina.ostium uteri´num tu´bae the uterine end of the fallopian tube; the point where the cavity of the tube becomes continuous with that of the uterus.ostium vagi´nae the external orifice of the vagina.os·ti·um, pl. os·ti·a (os'tē-ŭm, -ă), [TA] A small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, opening, os, mouth (2). [L. door, entrance, mouth] ostium (ŏs′tē-əm)n. pl. os·tia (-tē-ə) A small opening or orifice, as in a body organ or passage.ostium Plural, ostia Medtalk An opening, apertureos·ti·um, pl. ostia (os'tē-ŭm, -ă) [TA] A small opening, especially one that enters into a hollow organ or canal. [L. door, entrance, mouth]ostium An opening or mouth.ostium any of numerous openings present in sponges through which water is drawn in.os·ti·um, pl. ostia (os'tē-ŭm, -ă) [TA] Small opening, especially one of entrance into a hollow organ or canal.
See also: orifice, mouth (2) [L. door, entrance, mouth] |