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Pronunciation: ap′er-chūr


  1. Opening. An inlet or entrance to a cavity or channel. In anatomy, a gap or hole.
  2. The diameter of the objective of a microscope.

Synonym(s): aperturaTA

[L. apertura, an opening]

See Also: fossa, ostium, orifice, pore

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.