7 letters · 9 points in Scrabble
noun a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another
originEtymology tree English cool Latin -ns Latin -āns Old French -antbor. Proto-Indo-European *-onts Proto-Germanic *-ndz Proto-West Germanic *-andī Old English -ende Middle English -ant English -ant English coolant From cool + -ant.
Etymology from Wiktionary, CC BY-SA 3.0