the state of least energy of a particle, as an atom, or of a system of particles.
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.
The state of a physical system having the lowest possible potential energy. For example, an electron in the lowest energy orbital in a hydrogen atom is in a ground state. The ground state of a physical system tends to be stable unless energy is applied to it from the outside; states that are not the ground state have a tendency to revert to the ground state, giving off energy in the process. Compare excited state.
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
[ground-swel] /ˈgraʊndˌswɛl/ noun 1. a broad, deep or rolling of the sea, due to a distant storm or gale. 2. any surge of support, approval, or enthusiasm, especially among the general public: a groundswell of political support for the governor. /ˈɡraʊndˌswɛl/ noun 1. a considerable swell of the sea, often caused by a distant storm […]