tautoclin Min.
(ˈtɔːtəʊklɪn)
[ad. Ger. tautoklin (Breithaupt 1830), f. Gr. ταὐτό (tauto-) + κλίνειν to bend, incline; so called ‘because it has the same rhombohedral angle as dolomite’ (Chester).]
A greyish-white variety of ankerite.
| 1868 Dana Min. (ed. 5) 685. |