intrauterine device

noun
🔊/ˌɪntrəˌjuːtəraɪn dɪˈvaɪs/
🔊/ˌɪntrəˌjuːtəraɪn dɪˈvaɪs/
(abbreviation IUD)
(also coil)
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  1. a small plastic or metal object placed inside a woman’s uterus (= where a baby grows before it is born) to stop her becoming pregnant