rheology=الريولوجيا

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rheology=الريولوجيا

ONLINE ETYMOLOGY DICTIONARY:

rheology (n.)

1929, from Gk. rheos "a flowing, stream, current" (from PIE root *sreu-; see rheum) + -logy. Related: Rheologist; rheological.

rheum (n.)

late 14c., from O.Fr. reume (13c.), ultimately from Gk. rheuma "stream, current, a flowing," from rhein "to flow," from PIE root *sreu- "to flow" (cf. Skt. sravati "flows," srotah "stream;" Avestan thraotah- "stream, river," O.Pers. rauta "river;" Gk. rheos "a flowing, stream," rhythmos "rhythm," rhytos "fluid, liquid;" O.Ir. sruaim, Ir. sruth "stream, river;" Welsh ffrwd "stream;" O.N. straumr, O.E. stream, O.H.G. strom (second element in maelstrom); Lettish strauma "stream, river;" Lith. sraveti "to trickle, ooze;" O.C.S. struja "river," o-strovu "island," lit. "that which is surrounded by a river;" Polish strumień "brook").

-logy

word-forming element meaning "a speaking, discourse, treatise, doctrine, theory, science," from Gk. -logia (often via Fr. -logie or M.L. -logia), from root of legein "to speak;" thus, "the character or deportment of one who speaks or treats of (a certain subject);" see lecture (n.).

WIKIPEDIA

http://en.wikipedia.org/wiki/Rheology