gap junction: Meaning and Definition of

gap' junc"tion

Pronunciation: [key]
— Cell Biol. Cell Biol.
  1. a linkage of two adjacent cells consisting of a system of channels extending across a gap from one cell to the other, allowing the passage of ions and small molecules.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.