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A Writer's Dictionary:

aperture Definition


Dictionary Home » Words Starting with A » antonomasia ... apical » aperture


aperture
noun
    1. A small hole or opening.
      Thesaurus: opening, hole, gap, breach, orifice, chink, rent, cleft, crack, space, vent, fissure, rift.
    2. The opening through which light enters an optical instrument such as a camera or telescope.
    3. The effective diameter of the lens in such an instrument.
Etymology: 17c: from Latin apertura, from aperire to open.



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