n.
Pronunciation: - ˌ graf
Function: noun
Etymology: International Scientific Vocabulary
Date: 1884
: an instrument for dispersing radiation (as electromagnetic radiation or sound waves) into a spectrum and recording or mapping the spectrum
– spec · tro · graph · ic \ ˌ spek-t(r) ə - ' gra-fik \ adjective
– spec · tro · graph · i · cal · ly \ -fi-k( ə -)l ē \ adverb
– spec · trog · ra · phy \ spek- ' trä-gr ə -f ē \ noun