different between cavitand vs cryptand

English

cavity +? -and

cavitand (plural cavitands)

(chemistry) Any of several classes of macrocycle that have a shape containing a cavity in which a guest molecule or ion may fit.

crypto- +? -and?

cryptand (plural cryptands)

(chemistry) any of a class of polycyclic compounds related to the crown ethers, having three chains attached at two nitrogen atoms

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