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coitus interruptus

American  
[in-tuh-ruhp-tuhs] / ˌɪn təˈrʌp təs /

noun

plural

coitus interrupti
  1. sexual intercourse that is intentionally interrupted by withdrawal before ejaculation of semen into the vagina.

  2. an act or instance of this.


coitus interruptus British  
/ ˌɪntəˈrʌptəs /

noun

  1. the deliberate withdrawal of the penis from the vagina before ejaculation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of coitus interruptus

First recorded in 1895–1900; from New Latin: “interrupted coitus”