| 释义 | ▪ I. trichite, n.|ˈtrɪkaɪt, ˈtraɪ-|
[f. Gr. θρίξ, τριχ- hair + -ite1; in Min., a. Ger. trichit (Zirkel, 1867).]
1. Min. A name for very minute dark-coloured hair-like bodies occurring in the substance of some vitreous rocks.
1868Dana Min. (ed. 5) 805 The name Trichite..is applied by Zirkel..to microscopic capillary forms, often curved, bent, or zigzag,..opaque and black or reddish-brown, of undetermined nature, which he detected in some..glassy..volcanic rocks. 1879Rutley Study Rocks x. 162 Trichites..are minute elongated bodies resembling small hairs or fibres.
2. Zool. A name for extremely fine siliceous fibres found in certain sponge-spicules, or for such spicules themselves: see quot. 1887. Also attrib.
1887Sollas in Encycl. Brit. XXII. 418/1 (Sponges) A curious group of flesh spicules are the trichites. In this group silica..forms within the scleroblast a sheaf of immeasurably fine fibrillæ or trichites... The trichite sheaf may be regarded as a fibrillated spicule. 1890Cassell's Nat. Hist. VI. 322 In other forms, the trichites grow radiately outward.., and becoming thickened with age, produce a trichite-stellate, or, if they are very numerous, a trichite-globate or globate spicule.
3. Bot. (See quot.)
1900B. D. Jackson Gloss. Bot. Terms 275 Trichite, a needle-shaped crystal of amylose in starch grains, stated to form the latter by aggregation (A. Meyer).
Hence trichitic |-ˈɪtɪk| a., pertaining to or of the nature of a trichite, or containing trichites.
1879Rutley Stud. Rocks x. 170 Minute granules and trichitic bodies.
▪ II. † ˈtrichite, a. Obs. rare.
[f. as prec.]
Characterized by very fine fracture, so as to resemble or suggest hairs or fine filaments.
1764Platt in Phil. Trans. LIV. 41 The shells of the trichite kind. Ibid., note, The more debased sort breaks in a hairy trichite manner. |
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