1530s, "enormous wickedness," from French atrocité or directly from Latin atrocitatem (nominative atrocitas) "cruelty, fierceness, harshness," noun of quality from atrox "fierce, cruel, frightful," from PIE *atro-ek-, from root *ater- "fire" + root *okw- "to see;" thus "of fiery or threatening appearance." The meaning "an atrocious deed" is from 1793.
Proto-Indo-European root meaning "to see."
It forms all or part of: amblyopia; antique; antler; atrocity; autopsy; binocle; binocular; biopsy; catoptric; Cyclops; daisy; enoptomancy; eye; eyelet; ferocity; hyperopia; inoculate; inveigle; monocle; monocular; myopia; necropsy; ocular; oculist; oculus; oeillade; ogle; ophthalmo-; optic; optician; optics; optometry; panoptic; panopticon; Peloponnesus; pinochle; presbyopia; prosopopeia; stereoptican; synopsis; triceratops; ullage; wall-eyed; window.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit akshi "the eye; the number two," Greek osse "(two) eyes," opsis "a sight;" Old Church Slavonic oko, Lithuanian akis, Latin oculus, Greek okkos, Tocharian ak, ek, Armenian akn "eye."
"machine for recording and reproducing sounds by needle-tracing on some solid material," 1887, trademark by German-born U.S. inventor Emil Berliner (1851-1929), an inversion of phonogram (1884) "the tracing made by a phonograph needle," which was coined from Greek phōnē "voice, sound," from PIE root *bha- (2) "to speak, tell, say" + gramma "something written" (see -gram).
Berliner's machine used a flat disc and succeeded with the public. Edison's phonograph used a cylinder and did not. Despised by linguistic purists (Weekley calls gramophone "An atrocity formed by reversing phonogram") who tried at least to amend it to grammophone, it was replaced by record player after mid-1950s. There also was a graphophone (1886).