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[os-tee-uh m] /ˈɒs ti əm/

noun, plural ostia
[os-tee-uh] /ˈɒs ti ə/ (Show IPA)
Anatomy, Zoology. a small opening or orifice, as at the end of the oviduct.
Zoology. one of the tiny holes in the body of a sponge.
noun (biology) (pl) -tia (-tɪə)
any of the pores in sponges through which water enters the body
any of the openings in the heart of an arthropod through which blood enters
any similar opening

ostium os·ti·um (ŏs’tē-əm)
n. pl. os·ti·a (-tē-ə)
A small opening or orifice, as in a body organ.
os’ti·al adj.


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  • Ostium abdominale tubae uterinae

    ostium abdominale tubae uterinae ostium ab·dom·i·na·le tu·bae u·ter·i·nae (āb-dŏm’ə-nā’lē tōō’bē yōō’tə-rī’nē, tyōō’bē) n. The fimbriated or ovarian extremity of an oviduct.

  • Ostium of uterus

    ostium of uterus n. The opening of the uterus into the vagina.

  • Ostium uterinum tubae

    ostium uterinum tubae ostium u·ter·i·num tu·bae (yōō’tə-rī’nəm tōō’bē, tyōō’bē) n. The uterine opening of the oviduct.

  • Ostler

    [os-ler] /ˈɒs lər/ noun 1. . /ˈɒslə/ noun 1. (archaic) a stableman, esp one at an inn n. late 14c., phonetic spelling of hostler.

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