operative
— Adjective
– English
～ relating to or requiring or amenable to treatment by surgery especially as opposed to medicine; "a surgical appendix"; "a surgical procedure"; "operative dentistry"
operative
— Adjective
– English
～ (of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes"
operative
— Adjective
– English
～ effective; producing a desired effect; "the operative word"
operative
— Adjective
– English
～ being in force or having or exerting force; "operative regulations"; "the major tendencies operative in the American political system"
operatively
— Adverb
– English
～ in a manner to produce an effect
operator
— Noun
– English
～ (mathematics) a symbol or function representing a mathematical operation
operator
— Noun
– English
～ a shrewd or unscrupulous person who knows how to circumvent difficulties
operator
— Noun
– English
～ a speculator who trades aggressively on stock or commodity markets
operator
— Noun
– English
～ someone who owns or operates a business; "who is the operator of this franchise?"
operator gene
— Noun
– English
～ a gene that activates the production of messenger RNA by adjacent structural genes
operator
— Noun
– English
～ an agent that operates some apparatus or machine; "the operator of the switchboard"
operculate
— Adjective
– English
～ having an operculum
operculated
— Adjective
– English
～ having an operculum
operculum
— Noun
– English
～ a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted
operon
— Noun
– English
～ a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
operose
— Adjective
– English
～ characterized by effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"
operoseness
— Noun
– English
～ the quality of requiring extended effort
Opheodrys aestivus
— Noun
– English
～ of southern and eastern United States
Opheodrys
— Noun
– English
～ North American green snakes