the luminous region between the Crookes dark space and the Faraday dark space in a vacuum tube, occurring when the pressure is low.
- Negative hallucination
noun 1. (psychol) an apparent abnormal inability to perceive an object
noun 1. invested income that has produced a loss and hence may yield a tax deduction.
noun 1. a system of income subsidy through which persons having less than a certain annual income receive money from the government rather than pay taxes to it. A plan to raise the income of the poor by direct cash subsidies. Instead of paying an income tax, the poor would receive a cash payment from […]
noun, Physics, Chemistry. 1. See under (def 1). [ahy-uh n, ahy-on] /ˈaɪ ən, ˈaɪ ɒn/ noun, Physics, Chemistry. 1. an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons, as a cation (positive ion) which is created by electron loss and is attracted to the cathode […]