What does emissive mean?
'Emissive' is an adjective describing something that emits — that is, gives off — light or other electromagnetic radiation from within, rather than merely reflecting light from an external source. The distinction matters most in technology and science: an emissive display such as an OLED screen produces its own illumination at each pixel, whereas a non-emissive screen like a conventional LCD depends on a separate backlight. The word also appears in physics in phrases like 'emissive material' or 'emissive layer', describing substances that radiate energy when heated, electrically stimulated, or otherwise excited. Derived from the Latin verb 'emittere' ('to send out'), it shares its root with 'emit' and 'emission'. While largely confined to technical registers, 'emissive' has grown more familiar to general audiences as self-lit display technologies have become everyday objects.
adjectiveEmitting light or other forms of radiation, especially as a result of being energized rather than merely reflecting it. In physics and materials science, describes substances or devices that give off electromagnetic radiation.
- (of a material or device) Emitting light or electromagnetic radiation, especially when energized by electricity or heat.
- (physics) Relating to the process of emitting radiation, as in emissive power or emissivity contexts.
"OLED screens are truly emissive displays, generating their own light pixel by pixel."
"The phosphor coating becomes highly emissive when struck by electrons in a cathode-ray tube."
"Thermal cameras detect infrared radiation from emissive surfaces to map temperature differences."
Your phone screen may be emissive — every pixel makes its own light, unlike old LCDs that needed a backlight shining through them.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of emissive
'Emissive' derives from the Latin 'emittere', formed from 'e-' ('out of') plus 'mittere' ('to send'), literally meaning 'to send out'. English adopted the word alongside related terms such as 'emit' and 'emission', which became prominent during the development of modern physics in the 17th century and after. Its cognates include 'transmit', 'mission', and 'missile', all tracing back to the same Latin root for sending. In recent decades the word has gained currency through display technology, where 'emissive' distinguishes self-lit screens from those relying on external illumination.
How emissive is actually used
'Emissive' is primarily a technical term used in physics, optics, electronics, and display technology. It is rarely heard in everyday conversation but is standard vocabulary in engineering and scientific writing, particularly in discussions of OLED and LED displays and thermal imaging.
Easily confused with emissive
An emissary is a noun meaning a person sent on a mission as a representative, while 'emissive' is an adjective describing something that emits radiation.