† orthotomousadj.

Origin: A borrowing from Greek, combined with English elements. Etymons: ortho- comb. form, Greek -τόμος , -ous suffix.

Etymology: < ortho- comb. form + ancient Greek -τόμος (see -tome comb. form) + -ous suffix. Compare (in different sense) slightly earlier orthotomic adj. N.E.D. (1903) gives the pronunciation as (ǫɹþǫ·tŏməs) /ɔːˈθɒtəməs/.

Mineralogy. Obsolete. rare.

Having cleavages at right angles; = orthoclastic adj.

ΘΚΠ

the world > the earth > minerals > mineral structure or appearance > [adjective] > cleavage or fracture > having cleavage at particular angles

paratomous1825

orthotomous1861

orthoclastic1866

orthic1877

1861 H. W. Bristow Gloss. Mineral. 270/2 Orthotomous Kouphone Spar, Mohs. See Thomsonite.

1871 L. Colange Zell's Pop. Encycl. II. 571/3 Orthotomous..Having two cleavages at right angles with each other.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022).

单词	orthotomous
释义	† orthotomousadj. Origin: A borrowing from Greek, combined with English elements. Etymons: ortho- comb. form, Greek -τόμος , -ous suffix. Etymology: < ortho- comb. form + ancient Greek -τόμος (see -tome comb. form) + -ous suffix. Compare (in different sense) slightly earlier orthotomic adj. N.E.D. (1903) gives the pronunciation as (ǫɹþǫ·tŏməs) /ɔːˈθɒtəməs/. Mineralogy. Obsolete. rare. Having cleavages at right angles; = orthoclastic adj. ΘΚΠ the world > the earth > minerals > mineral structure or appearance > [adjective] > cleavage or fracture > having cleavage at particular angles paratomous1825 orthotomous1861 orthoclastic1866 orthic1877 1861 H. W. Bristow Gloss. Mineral. 270/2 Orthotomous Kouphone Spar, Mohs. See Thomsonite. 1871 L. Colange Zell's Pop. Encycl. II. 571/3 Orthotomous..Having two cleavages at right angles with each other. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online March 2022). < adj.1861
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