telogeen

Telogeen is a term that has appeared in a limited number of discussions in biology and related fields, but it is not a widely adopted term in standard scientific nomenclature. In most authoritative sources, the concept that telogeen might be used to describe is treated as telogen or as part of a developmental ending phase, rather than as a distinct, defined term of its own.

Etymology and meanings commonly associated with the word suggest it could be formed from Greek roots meaning end or conclusion (telos) and origin or producing (gen). Because telogeen is not consistently defined across sources, its exact meaning can vary by author or context. In the dermatology and trichology literature, if telogeen is encountered, it is often best understood as a potential variant spelling or translation of telogen, the resting phase of the hair growth cycle, rather than as a separate biological category. The standard sequence in hair biology is anagen (growth), catagen (transition), and telogen (resting).

Usage and cautions: Telogeen is rarely used in peer-reviewed publications as a formal term. When it appears, authors sometimes treat it as synonymous with telogen or as a nonstandard spelling error. For clarity and precision, most editors and researchers prefer the established term telogen and, when discussing late-stage or ending phases of development, specify the process explicitly rather than adopting an ambiguous neologism.

See also: telogen, hair growth cycle, catagen, anagen.