These objects move about through the lattice by one of several different types of diffusion, but basically they can jump from point to point through the crystalline structure into areas of lower concentration.
Definition of mascot. : a person, animal, or object adopted by a group as a symbolic figure especially to bring them good luck the team had a mountain lion as their mascot.
Bear is a gay slang term. It describes a hairy, heavy-set (sometimes muscular) gay or bisexual man. A bear typically projects an image of rugged masculinity. Some bears present a very masculine, over-the-top image of a ruggedly masculine man.