Aperture
(Science: physics) The opening in an optical system which restricts the size of the bundle of rays incident on a given surface. (Usually circular and specified by diameter.)
Dictionary > Aperture
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This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of fruits, fruit dispersal mechanisms, and seed germination. The distinctions between dicots and monocots, the two major groups of flowering plants, are presented in this tutorial...
