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Meaning of coated pit

coat'ed pit'

Pronunciation: [key]
— Cell Biol. Cell Biol.
  1. a clathrin-lined depression in the outer surface of a cell membrane, formed of receptors and their specific ligands, that becomes a coated vesicle upon endocytosis.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.