emissary /emˈis-ər-i/ noun

1. Someone sent out on a mission, esp on behalf of a government or state
2. An agent sent out on a secret mission
3. A spy
4. An underground outlet, esp of a lake

1. Sent out
2. Outgoing

emissˈile adjective

Able to be pushed out or forward

emission /-mishˈən/ noun

1. The act of emitting
2. That which is issued at one time
3. The discharge of semen or other fluid from the body
4. The release of electrons from parent atoms on absorption of energy above the average electron energy (physics)

emissˈive adjective

Emitting or sending out

emissivˈity /ē-/ noun

The ratio of emissive power of a surface at a given temperature to that of a black body at the same temperature and with the same surroundings

emittˈer noun

In a transistor, the region from which charge carriers are injected into the base

emission current noun (electronics)

The total electron flow from an emitting source

emission spectrum noun

The wavelength distribution of electromagnetic radiation emitted by a self-luminous source

emission theory noun

The corpuscular theory of light (qv under corpus)