Definition of Polytrichum in English:

Polytrichum

Pronunciation /pəˈlɪtrɪkəm/

noun

  • A genus of mosses of the family Polytrichaceae, whose members have calyptrae covered with fine hairs; (also polytrichum) a moss of this genus, especially Polytrichum commune, the golden maidenhair or hair moss (also "polytrichum moss").

    Valid publication of the genus name: J. Hedwig Species muscorum (1801) 88.

Origin

Mid 18th century; earliest use found in New & Complete Dictionary Arts & Science. From post-classical Latin Polytrichum, apparently from polytrichon, after Latin nouns in -um.