chromosomal aberration: Meaning and Definition of

chromoso'mal aberra'tion

Pronunciation: [key]
— Genetics. Genetics.
  1. any irregularity or abnormality of chromosome distribution, number, structure, or arrangement. Cf. deletion, duplication, inversion, translocation.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.