10 letters · 15 points in Scrabble
noun the change in direction of a propagating wave (light or sound) when passing from one medium to another
noun the amount by which a propagating wave is bent
originEtymology tree Latin refringō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin refrāctiōbor. English refraction Borrowed from Latin refrāctiō.
Etymology from Wiktionary, CC BY-SA 3.0