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ostium

Syllabification: (os·ti·um)
Pronunciation: /ˈästēəm/
Definition of ostium

noun (plural ostia /-tēə/)

Anatomy & Zoology
  • an opening into a vessel or cavity of the body.
  • Zoology each of a number of pores in the wall of a sponge, through which water is drawn in.

Origin:

early 17th century: from Latin, 'door, opening'

ostium in other Oxford dictionaries

Definition of ostium in the British & World English dictionary

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