Pl. trichomata. [mod.L., a. Gr. τρίχωμα a growth of hair, f. τριχοῦν to cover with hair.]

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  1.  Path. A disease of the hair: = PLICA 1.

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1799.  Hooper, Med. Dict., Trichōma, a disease of the hair. See Plica polonica.

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1857.  Dunglison, Med. Lex., Trichoma, Capillamentum, Plica.

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  2.  Bot. Each of the filaments composing the thallus in algæ of the order Nostochineæ.

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1866.  Treas. Bot., Trichoma, the filamentous thallus of algals, as Conferva.

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1879.  W. G. Farlow, Marine Algæ (1881), 11. In … the Nostochineæ, the cells are … attached to one another in the form of filaments, to which the name of trichomata is given.

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  Hence (from sense 1) Trichomaphyte [Gr. φυτόν plant], a cryptogamic growth formerly supposed to cause trichoma; Trichomatose a., affected with trichoma.

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1857.  in Dunglison, Med. Lex.

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