any of several terrestrial rodents of the squirrel family, as of the genus Citellus and chipmunks of the genus Tamias. circ;circ;
any burrowing sciurine rodent of the genus Citellus and related genera, resembling chipmunks and occurring in North America, E Europe, and Asia Also called gopher
noun, Physics. 1. the state of least energy of a particle, as an atom, or of a system of particles. noun 1. the lowest energy state of an atom, molecule, particle, etc Compare excited (sense 4) ground state n. The state of least possible energy in a physical system, as of atoms or molecules. ground […]
noun 1. . noun 1. a terminal equipped to receive, or receive and transmit, signals from or to communications satellites. earth station An on-ground radio communication site used for tracking, controlling, or otherwise communicating with spacecraft or satellites.
noun, Tennis. 1. a stroke made by hitting the ball after it has bounced from the ground. Compare (def 4b). noun 1. (tennis) any return made to a ball that has touched the ground, as opposed to a volley
noun, Biology. 1. Also called matrix. the homogeneous substance in which the fibers and cells of connective tissue are embedded. 2. Also called hyaloplasm. the clear portion of the cell cytoplasm; cytosol. ground substance n. ground substance