The story
From detect + -o- + -graph. Possibly originally a trademark.
Etymology from Wiktionary, CC BY-SA 4.0.
detectograph
Today it means: An early audio recording device used in wiretaps. Full definition →
Today it means: An early audio recording device used in wiretaps. Full definition →
From detect + -o- + -graph. Possibly originally a trademark.
Etymology from Wiktionary, CC BY-SA 4.0.