(general) The act or process of duplicating; the state of being duplicated; a doubling.

(biology) The state or act of dividing as a natural process of growth or a spontaneous action.

(genetics) The act or process of duplicating or repeating a region in the genetic material or chromosome, as in gene duplication and chromosomal duplication.

(pathology) A disorder in which a body part is duplicated, such as in diprosopus (a craniofacial duplication) and diphalia (a penile duplication).


Word origin: Latin duplicātiōn- (s. of duplicātiō), equiv. to duplicāt(us) + -iōn.
Related form: duplicate.

Related term: gene duplication.

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