9 letters · 18 points in Scrabble
noun British chemist and physicist who established that water is a compound of hydrogen and oxygen and who calculated the density of the earth (1731-1810)
origin* (English village): "Cāfna's enclosure", from Old English personal name *Cāfna + edisċ (“pasture”); recorded as Kauanadisc in 1086 (DB). * (in Vermont): Likely named after William Cavendish, 4th Duke of Devonshire. * (banana): Named after William Cavendish, 6th Duke of Devonshire.
Etymology from Wiktionary, CC BY-SA 3.0