plural ostia
ˈä-stē-ə 
: a mouthlike opening in a bodily part (such as a fallopian tube or a blood vessel)
Examples of ostium in a Sentence
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Surgical treatment of a fungus ball consists in opening the infected sinus cavity at the level of its ostium and removing fungal concretions while sparing the normal mucosa.
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Seriously Science, Discover Magazine, 9 Jan. 2017
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Seriously Science, Discover Magazine, 9 Jan. 2017
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“Ostium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ostium. Accessed 19 Nov. 2024.
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