allotriomorphic, a. Min.
(æˌlɒtrɪəʊˈmɔːfɪk)
[ad. G. allotriomorph (H. Rosenbusch Mikrosk. Physiog. d. Massigen Gest. (1886) i. 11), f. Gr. ἀλλότριος belonging to another (ἄλλος other) + µορϕή form: see -ic.]
= xenomorphic a. (opp. idiomorphic). Hence aˌllotrioˈmorphically adv. Cf. anhedral a.
| 1887 Geol. Mag. Mar. 123 The form of an individual mineral in a rock may..be..dependent on causes other than the molecular forces proper to the mineral (allotriomorphic). 1888 [see xenomorphic a.]. 1888 W. S. Bayley in Amer. Naturalist Mar. 209 When none of the constituents are..[idiomorphically] developed the structure is allotriomorphically granular. 1922 C. H. Desch Metallography (ed. 3) ix. 179 Each grain [of metal] is, to use the mineralogical term, an ‘allotriomorphic’ crystal, the outline of which is determined by the presence of neighbouring grains. 1958 A. D. Merriman Dict. Metallurgy 5/1 Allotriomorphic, a term applied to crystals which have taken their shape from their surroundings and have not been allowed to develop the contours prescribed by their crystalline form. |