Telogen refers to the resting phase of the hair growth cycle. It is the time when hair stops growing and remains in a state of rest before eventually falling out and being replaced by new hair. Full definition
This can trigger a type of hair loss called telogen effluvium. (health.com)
Some breeds of dog, e.g. Chinese Crested have most of their follicles in telogen and, thus, may be almost completely hairless. (dogplay.com)
In the context of weight loss, drastically low calorie diets and poor energy availability are likely to cause a specific type of hair loss called telogen effluvium. (instantknockout.com)