Definition of Insinuate

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Insinuate: In the biomedical sciences, to introduce slowly, through a winding or narrow passage, or by a persistent movement.

The term "insinuate" in this sense carries the connotation of introducing artfully and gently, as a cardiologist would do in insinuating a catheter (a tube) into the arteries of ones heart.

The origin of "insinuate" is from the Latin in-, in + sinus, the bosom, meaning "in the bosom."