10 letters · 15 points in Scrabble
noun corrective consisting of a replacement for a part of the body
originVia Latin, from Ancient Greek πρόσθεσις (prósthesis, “addition”), from προστίθημι (prostíthēmi, “to add”), from πρός (prós, “towards”) + τίθημι (títhēmi, “to place”), from Proto-Indo-European *próti, *préti + *dʰédʰeh₁ti (“to be putting, to be placing”). By surface analysis, prosth- + -esis.
Etymology from Wiktionary, CC BY-SA 3.0