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Origin and history of operant

operant(adj.)

"that works, working, engaged in action," early 15c., from Latin operantem (nominative operans), present participle of operari "to work, labor" (in Late Latin "to have effect, be active, cause"), from opera "work, effort," related to opus (genitive operis) "a work" (from PIE root *op- "to work, produce in abundance"). Psychological sense of "involving behavior modification" coined 1937 by U.S. psychologist B.F. Skinner (as in operant conditioning, 1938, Skinner).

also from early 15c.

Entries linking to operant

*op-

Proto-Indo-European root meaning "to work, produce in abundance."

It might form all or part of: cooperate; cooperation; copious; copy; cornucopia; hors d'oeuvre; inure; maneuver; manure; oeuvre; office; official; officinal; omni-; omnibus; omnium gatherum; op. cit.; opera; operate; operation; operose; optimism; optimum; opulence; opulent; opus; Oscan.

It might also be the source of: Sanskrit apas- "work, religious act," apnas- "possession, property;" Hittite happina- "rich;" Avestan huapah- "doing good work, masterly;" Latin opus "a work, labor, exertion;" Greek ompne "food, corn;" Old High German uoben "to start work, to practice, to honor;" German üben "to exercise, practice;" Dutch oefenen, Old Norse æfa, Danish øve "to exercise, practice;" Old English æfnan "to perform, work, do," afol "power."

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    opera
    "a drama sung" [Klein], "a form of extended dramatic composition in which music is essential and predominant," 1640s, from Italian opera, literally "a work, labor, composition," from Latin opera "work, effort" (Latin plural regarded as feminine singular), secondary (abstract) nou
    opus
    "a work, composition," especially a musical one, 1809, from Latin opus "a work, labor, exertion" (source of Italian opera, French oeuvre, Spanish obra), from Proto-Italic *opes- "work," from PIE root *op- "to work, produce in abundance." The plural, seldom used as such, is opera.
    revelation
    c. 1300, revelacioun, "disclosure of information or knowledge to man by a divine or supernatural agency," from Old French revelacion and directly from Latin revelationem (nominative revelatio), noun of action from past-participle stem of revelare "unveil, uncover, lay bare" (see
    enough
    c. 1300, from Old English genog "sufficient in quantity or number," from Proto-Germanic compound *ganog "sufficient" (source also of Old Saxon ginog, Old Frisian enoch, Dutch genoeg, Old High German ginuog, German genug, Old Norse gnogr, Gothic ganohs). First element is Old Engli
    oasis
    "fertile spot in a desert, where there is a spring or well and more or less vegetation," originally in reference to the Libyan desert, 1610s, from French oasis (18c.) and directly from Late Latin oasis, from Greek oasis, probably from Hamitic (compare Coptic wahe, ouahe "oasis,"
    filibuster
    1580s, flibutor "pirate," especially, in history, "West Indian buccaneer of the 17th century" (mainly French, Dutch, and English adventurers), probably ultimately from Dutch vrijbueter (now vrijbuiter) "freebooter," a word which was used of pirates in the West Indies in Spanish (
    equity
    early 14c., equite, "quality of being equal or fair, impartiality;" late 14c., "that which is equally right or just to all concerned," from Old French equite (13c.), from Latin aequitatem (nominative aequitas) "the uniform relation of one thing to others, equality, conformity, sy
    luxury
    c. 1300, "sexual intercourse;" mid-14c., "lasciviousness, sinful self-indulgence;" late 14c., "sensual pleasure," from Old French luxurie "debauchery, dissoluteness, lust" (12c., Modern French luxure), from Latin luxuria "excess, extravagant living, profusion; delicacy" (source a
    banter
    "attack with good-humored jokes and jests," 1670s, origin uncertain; said by Swift to be a word from London street slang. Related: Bantered; bantering. The noun, "good-humored ridicule," is from 1680s. The third refinement observable in the letter I send you, consists in the cho
    hybrid
    c. 1600, "offspring of plants or animals of different variety or species," from Latin hybrida, variant of ibrida "mongrel," specifically "offspring of a tame sow and a wild boar," of unknown origin but probably from Greek and somehow related to hubris. A rare word before the gene

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