[op-uh-ret-uh] /ˌɒp əˈrɛt ə/
a short opera, usually of a light and amusing character.
a type of comic or light-hearted opera
“light opera,” 1775, from Italian operetta, diminutive of opera.
Comic or lighthearted operas of the kind written by Gilbert and Sullivan. Operettas generally have a substantial amount of spoken (not sung) dialogue.
[op-uh-ron] /ˈɒp əˌrɒn/ noun, Genetics. 1. a set of two or more adjacent cistrons whose transcription is under the coordinated control of a promoter, an operator, and a regulator gene. /ˈɒpəˌrɒn/ noun 1. (genetics) a group of adjacent genes in bacteria functioning as a unit, consisting of structural genes and an operator operon op·er·on (ŏp’ə-rŏn’) […]
[op-uh-rohs] /ˈɒp əˌroʊs/ adjective 1. industrious, as a person. 2. done with or involving much labor. /ˈɒpəˌrəʊs/ adjective (rare) 1. laborious 2. industrious; busy adj. “involving much labor,” 1670s, from Latin operosus “taking great pains, laborious, active, industrious,” from opus (genitive operis) “work” (see opus). Related: Operosity.
1. Old Persian.
Object Persistence Framework