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1610s, "to form into tubes," from in- (2) "in" + Latin tuba "tube" (see tuba) + -ate (2). Medical sense is from 1889. Related: Intubated; intubation.
intubate in·tu·bate (ĭn'tōō-bāt', -tyōō-)v. in·tu·bat·ed, in·tu·bat·ing, in·tu·bates To insert a tube into a hollow organ or body passage.