[oh-pe-re ki-tah-toh; English op-uh-ree sahy-tey-toh, si-tah-toh] /ˈoʊ pɛˌrɛ kɪˈtɑ toʊ; English ˈɒp əˌri saɪˈteɪ toʊ, sɪˈtɑ toʊ/
[op-uh-ret-uh] /ˌɒp əˈrɛt ə/ noun 1. a short opera, usually of a light and amusing character. /ˌɒpəˈrɛtə/ noun 1. a type of comic or light-hearted opera n. “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 […]
[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.