9 letters · 14 points in Scrabble
adjective having a latticelike structure pierced with holes or windows
adjective designating or relating to a compound in which one component is physically enclosed within the crystal structure of another
originFrom Latin clāthrātus, from clāthrī (“lattice”) + -ātus, see -ate (adjective-forming suffix). The noun is from the clipping of clathrate compound, see -ate.
Etymology from Wiktionary, CC BY-SA 3.0