chyron:
In the television industry, a lower third is a graphic overlay placed in the title-safe lower area of the screen, though not necessarily the entire lower third of it, as the name suggests. …
Lower thirds are also often known as “CG” or captions, and sometimes chyrons in North America, due to the popularity of Chyron Corporation‘s Chiron Icharacter generator, an early digital solution developed in the 1970s for rendering lower thirds. [Wikipedia]
Learn something new everyday. I suspect there’s a word for words like chyron, not to mention g**g1e, but I don’t recall what that might be offhand.