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Meaning of colicin

col•i•cin

Pronunciation: (kol'u-sin), [key]
— n. Pharm.
  1. any bacteriocin produced by certain strains of Escherichia coli and having a lethal effect on strains other than the producing strain.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.