| 单词 | emission |
| 释义 | Word Frequency emission(ɪˈmɪʃən) noun 1. the act of emitting or sending forth 2. energy, in the form of heat, light, radio waves, etc, emitted from a source 3. a substance, fluid, etc, that is emitted; discharge 4. a measure of the number of electrons emitted by a cathode or electron gun at 1000°C the emission is 3 mA See also secondary emission, thermionic emission 5. physiology any bodily discharge, esp an involuntary release of semen during sleep 6. an issue, as of currency Derived forms emissive (eˈmissive) adjective Word origin C17: from Latin ēmissiō, from ēmittere to send forth, emit |
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