the emission of electrons (secondary electrons) from a material that is bombarded with electrons or ions.
(physics) the emission of electrons (secondary electrons) from a solid as a result of bombardment with a beam of electrons, ions, or metastable atoms: used in electron multipliers
The emission of electrons or ions from a material, caused by collisions of electrons or other charged particles with the material. Electron multipliers, photomultipliers, and Geiger counters all work by means of secondary emission.
- Secondary encephalitis
secondary encephalitis n. A usually demyelinating form of encephalitis contracted following vaccination for smallpox or during convalescence from measles, mumps, varicella, and certain other infectious diseases.
- Secondary follicle
secondary follicle n. See Graafian follicle.
noun, Psychiatry. 1. any advantage, as increased attention, disability benefits, or release from unpleasant responsibilities, obtained as a result of having an illness (distinguished from primary gain). secondary gain n. Interpersonal or social advantages gained indirectly from organic illness, such as an increase in attention from others.
- Secondary glaucoma
secondary glaucoma n. Glaucoma occurring as a sequel to preexisting ocular disease or injury.