clath·rate 
(klăthrāt′)
(klăthrāt′)adj.
1. Biology Having a latticelike structure or appearance: clathrate scales.
2. Chemistry Of or relating to inclusion complexes in which molecules of one substance are completely enclosed within the crystal structure of another.
n.
Chemistry
Chemistry
A clathrate compound, such as methane hydrate.
[Latin clāthrātus, past participle of clāthrāre, to furnish with a lattice, from clāthrī, clātra, lattice, from Greek klēithra, pl. of klēithron, door bar, from kleiein, to close.]