viscoid
Derived from viscose (a liquid made from cellulose).
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Describing a type of motion involving the hydrodynamics of viscous fluids intermixing.
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Laws of Glacier-Motion.—The term differential motion is a condensed expression for all the laws of glacier-motion. It asserts that the different parts of a glacier do not move together as a solid, but move among themselves in the manner of a fluid. A glacier moves like a fluid, though a very stiff, viscous fluid; its motion may therefore be rightly called viscoid. We will mention some of the most important laws of fluid-motion, and show that glaciers conform to them […]
Where it comes from
By surface analysis, visco- + -oid; evidently independently coined several times by several scientists in the late nineteenth through early twentieth centuries.
Adapted from the Wiktionary entry viscoid (CC BY-SA 4.0).