Definition of telogen in English:



  • [mass noun] The resting phase of a hair follicle.

    Often contrasted with anagen
    • ‘This test produces a trichogram to assess the telogen: anagen ratio but is rarely needed for clinical diagnosis of hair loss.’
    • ‘In people who have telogen effluvium, a larger than normal number of hair follicles become inactive.’
    • ‘It is likely that they involve stem-cell failure at the base of the follicles, which inhibits follicular recovery from the telogen phase.’
    • ‘Hair grows in cycles: anagen is the growth phase; catagen is the transition phase; and telogen is the resting phase.’
    • ‘A 0.1% melatonin or a placebo solution was applied on the scalp once daily for 6 months and trichograms were performed to assess anagen and telogen hair rate.’


1920s: from Greek telos end + -gen.