emission
https://gyazo.com/f4a8e6179f8e9007ca32af41c6a31bfc
source: Castle GIF - Find & Share on GIPHY
noun
the production and discharge of something, especially gas or radiation:
〖通例～s〗 (大気中へのガスなどの)排［放］出物［量］
e.g. the effects of lead emission on health
e.g. cuts in carbon dioxide emissions.
an ejaculation of semen:
射精
e.g. nocturnal emissions.
ORIGIN
late Middle English (in the sense ‘emanation’): from Latin emissio(n-), from emiss- ‘sent out’, from the verb emittere (see emit).