Definition of telestrator in US English:

telestrator

(also telestrater)

noun

US
  • An electronic device which enables a person to write or draw freehand over a moving or still video image, originally consisting of a television screen and a light pen, but now more commonly controlled using a touch screen or a graphics tablet.

Origin

1960s; earliest use found in The Washington Post. From tele- + -strator.

Pronunciation

telestrator

/ˈtɛlɪstreɪtə/