a circular rubber device that a woman puts inside her vagina before having sex, to avoid becoming pregnant
Iris diaphragm
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An adjustable diaphragm, suggesting the iris of the eye in itsaction, for regulating the aperture of a lens, consisting of a numberof thin pieces fastened to a ring. It is used in cameras andmicroscopes.
Iris diaphragm meaning & definition 1 of Iris diaphragm.
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