Status #117691

spectrum (n.) 1610s, "apparition, specter," from Latin spectrum (plural spectra) "an [...]


Mochdre, Conwy
via The Full Circle Project
spectrum (n.)

1610s, "apparition, specter," from Latin spectrum (plural spectra) "an appearance, image, apparition, specter," from specere "to look at, view" (from PIE root *spek- "to observe"). Meaning "visible band showing the successive colors, formed from a beam of light passed through a prism" first recorded 1670s. Figurative sense of "entire range (of something)" is from 1936.

Online Etymology
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