From The Collaborative International Dictionary of English v.0.44 [gcide]:
Catheter \Cath"e*ter\, noun [L., fr. Gr. ? a thing let down or put in, catheter, fr. ? to send down, to let down; ? + ? to send.] (Med.) The name of various instruments for passing along mucous canals, esp. applied to a tubular instrument to be introduced into the bladder through the urethra to draw off the urine.
{Eustachian catheter}. See under {Eustachian}.
{Prostatic catheter}, one adapted for passing an enlarged prostate.
From WordNet (r) 2.0 [wn]:
noun
1: a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
36 Moby Thesaurus words for "catheter": adjutage, drainpipe, efflux tube, fire hose, flue pipe, funnel, garden hose, gas pipe, hose, hosepipe, nipple, organ pipe, pipe, pipeline, pipette, piping, reed, reed pipe, siamese, siamese connection, siphon, snorkel, soil pipe, standpipe, steam pipe, stem, straw, tap, tube, tubing, tubulation, tubule, tubulet, tubulure, waste pipe, water pipe
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