ostium

ostium is a topic covered in the Taber's Medical Dictionary.

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(os′tē-ŭm)
(os′tē-ă)
pl. ostia [L. ostium, a little opening]
A small opening, esp. one into a tubular organ.
ostial (os′tē-ăl ), adj.

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(os′tē-ŭm)
(os′tē-ă)
pl. ostia [L. ostium, a little opening]
A small opening, esp. one into a tubular organ.
ostial (os′tē-ăl ), adj.

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