What is aperture?

Aperture are:

  • - 1. An opening, hole, or gap
  • - 2. An opening, usually adjustable, in an optical instrument which limits the amount of light passing through the lens.

inferior a. of minor pelvis See pelvic plane of outlet, under plane.
lateral a. of fourth ventricle One of two lateral openings on the roof of the fourth ventricle of the brain, communicating with the subarachnoid cavity.
a. of maxillary sinus A large, irregular aperture through which the maxillary sinus
communicates with the nasal cavity.
median a. of fourth ventricle An opening in the midline of the roof of the fourth ventricle of the brain, communicating with the subarachnoid cavity.
a. of sphenoid sinus An orifice in the anterior wall of the sphenoid sinus through which the sinus opens into the nasal cavity.
superior a. of minor pelvis See pelvic plane of inlet, under plane.

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