an electronic special-effects system for combining a desired background with live foreground action.
What Does 🔑 Key Emoji Mean?Not to be confused with the old key emoji ... the key emoji depicts a single key, and it's presented in varying shades of brass and silver on various platforms.
Origin of chroma key
First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019