combining form, repr. Gr. τραχύ-ς rough, in a few modern scientific terms. Trachycarpous a. Bot. [Gr. καρπός fruit], rough-fruited, Trachychromatic a. [Gr. χρῶμα sb. a color], applied to certain cells in bone-marrow which take a deep stain. Trachyglossate, Zool. [Gr. γλῶσσα tongue], a. belonging to the division Trachyglossa of octopod mollusks, having radular teeth upon the tongue; sb. a trachyglossate octopod. Trachymedusan, Zool., a. belonging to the order Trachymedusæ of Craspedote Hydrozoa; sb. a hydrozoan of this order. Trachynemid, Zool. [Gr. νῆμα thread], a. belonging to the family Trachynemidæ of Craspedote Hydrozoa; sb. a hydrozoan of this family. Trachynote, a fish of the extinct genus Trachynōtus. ǁ Trachyphonia, Path. [mod.L. f. Gr. φωνή voice], roughness or hoarseness of voice. Trachypteroid, Ichth. [Gr. πτερόν wing, taken as = fin: see -OID], a. resembling or allied to the genus Trachypterus or family Trachypteridæ of spiny-finned fishes, including the ‘king of the salmon,’ T. altivelis; sb. a fish of this family. Trachyspermous a., Bot. [Gr. σπέρμα seed], rough-seeded.
1860. Mayne, Expos. Lex., Trachycarpus, having rough fruit,… *trachycarpous.
1900. in B. D. Jackson, Gloss. Bot. Terms.
1909. Cent. Dict. Suppl., *Trachychromatic.
1891. Cent. Dict., Trachyglossate.
1890. Q. Jrnl. Microsc. Sc., Feb., 511. No *Trachymedusan has been observed to pass through a hydroid phase.
1883. Rolleston & Jackson, Anim. Life, 751. In the family Aglauridæ, the Petasid sub-family Petachnidæ, and the *Trachynemid Pectyllidæ.
1848. Smart, *Trachynotes, rough-backed creatures—the generic name of a division of fossil fishes.
1860. Mayne, Expos. Lex., *Trachyphonia, term for a rough voice.
1891. Cent. Dict., *Trachypteroid. Ibid., *Trachyspermous.
1900. in B. D. Jackson, Gloss. Bot. Terms.
b. Min. In names of rocks, taken as combining form of TRACHYTE, and denoting an igneous rock or lava intermediate between trachyte and that denoted by the second element, as trachyandesite, trachybasalt, trachydolerite, trachyrhyolite.
1888. Cassell’s Encycl. Dict., Trachybasalt, Trachydolerite.
1897. H. S. Washington, Jrnl. Geol. (U.S.), May–June, 351. For those intermediate effusive rocks in which the plagioclase occurring along with orthoclase is acid … the name trachyandesite, which is in use in France, will be reserved. Ibid. The intermediate potash-rich rocks … carry basic plagioclase-labradorite to anorthite—along with orthoclase, and such rocks will be called collectively in this paper by the name of trachydolerite,… proposed by Abich as far back as 1841.
1909. Cent. Dict. Suppl., Trachyrhyolite.
