tubule(redirected from T tubules)
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any small tubular structure, esp one in an animal, as in the kidney, testis, etc.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A slender, elongated microscopic tube in an anatomical structure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.