8 letters · 16 points in Scrabble
noun (thermodynamics) a thermodynamic quantity equal to the internal energy of a system plus the product of its volume and pressure
originFrom Ancient Greek ἐν- (en-, “in”) + θάλπω (thálpō, “to warm”). Coined by Dutch physicist Heike Kamerlingh Onnes, but first used in print by J. P. Dalton in 1909 in a paper titled "Researches on the Joule-Kelvin-effect, especially at low temperatures".
Etymology from Wiktionary, CC BY-SA 3.0