U.S. civilian espionage agency, initialism (acronym) of Central Intelligence Agency, founded 1947 as successor to the Office of Strategic Services (OSS).
c. 1500, a back-formation from intelligence or else from Latin intelligentem (nominative intelligens), present participle of intelligere. Intelligent design, as a name for an alternative to atheistic cosmology and the theory of evolution, is from 1999. Related: Intelligently.
"pertaining to, performed by, or originating in the intellect," 1650s, from Greek noētikos "intelligent," from noēsis "a perception, intelligence, thought" (see noesis). Related: Noetical (1640s).
"top of the head," Middle English nol "head," especially as the seat of intelligence, from Old English hnol, cognate with Middle Dutch nolle, Old High German hnol "back part of the head."