S phase

noun Cell Biology.

the period of the cell cycle prior to mitosis, during which the chromosomes are replicated.

Origin of S phase

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for s phase

S phase


The phase of the mitotic cycle during which DNA synthesis occurs.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.