(physics) Any of several electronic devices that control electron current through vacuum, gas or vapor between electrodes within a sealed container, usually of glass or metal and often designed to be easily installed in and removed from the equipment in which it is used.

plural of electronic resource

(chemistry, physics) An electron, in an atomic orbital, for which there is no other electron in the same orbital but with opposite spin; a characteristic of free radicals and other reactive species

(physics) A measure of the probability of finding an electron at a specific location within an orbital / (physics) A measure of the number of electrons per unit volume of space.

(physics) The collective states of all electrons in an atom having the same principal quantum number (visualized as an orbit in which the electrons move).

telecottage

plural of electronic cottage

(physics) A nuclear reaction in which an electron (either free, or from the shell of the atom itself) is absorbed into a nucleus, a proton being converted into a neutron in the process

(physics) The energy released when an electron is attached to an atom or molecule; used as a measure of its ability to form an anion

(chemistry) A reducing agent that functions by donating electrons to another compound