anagen

noun an·a·gen \ ˈa-nə-ˌjen \

Definition of anagen

: the active phase of the hair growth cycle that precedes catagen and telogen, that is marked by rapid division and differentiation of cells in the lower portion of the hair follicle and by lengthening of the hair shaft, and that typically lasts between two to six years
Note: At any given time, approximately 80 to 90% of hair follicles are in anagen.

Origin and Etymology of anagen


Medical Dictionary

anagen

noun an·a·gen \ ˈan-ə-ˌjen \

medical Definition of anagen

: the active phase of the hair growth cycle preceding catagen and telogen
  • The initial step, anagen, provides the active growth of the hair fiber, during which cells at the base of the follicle rapidly divide.
  • —Damaris ChristensenScience News20 Oct. 2001

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