Definition of rheid in English:

rheid

noun

Geology
  • A substance which deforms by viscous flow when below its melting point; especially a rock of this kind.

adjective

Geology
  • Characteristic of a rheid.

Origin

1950s. From ancient Greek ῥεῖν to flow (from the same Indo-European base as Sanskrit sru- to flow) + -id, after fluid, liquid.

Pronunciation

rheid

/ˈriːɪd/