Definition of catagen
: a short transitional phase of the hair growth cycle between anagen and telogen that usually lasts between 10 to 20 days and during which the lower portion of the hair follicle regresses and hair growth ends
In catagen, the hair follicle stops producing the fiber and regresses, shrinking dramatically.— Damaris Christensen
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Merriam-Webster unabridged
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Time Traveler for catagen
The first known use of catagen was in 1926
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