[ef-i-key-shuh s] /ˌɛf ɪˈkeɪ ʃəs/
capable of having the desired result or effect; effective as a means, measure, remedy, etc.:
The medicine is efficacious in stopping a cough.
capable of or successful in producing an intended result; effective as a means, remedy, etc
“sure to have the desired effect” (often of medicines), 1520s, from Latin efficaci-, stem of efficax (see efficacy) + -ous. Related: Efficaciously; efficaciousness.
[ef-i-kuh-see] /ˈɛf ɪ kə si/ noun, plural efficacies. 1. capacity for producing a desired result or effect; effectiveness: a remedy of great efficacy. /ˈɛfɪkəsɪ/ noun 1. the quality of being successful in producing an intended result; effectiveness n. 1520s, from Latin efficacia “efficacy, efficiency,” from efficax (genitive efficacis) “powerful, effective,” from stem of efficere “work […]
[ih-fish-uh n-see] /ɪˈfɪʃ ən si/ noun, plural efficiencies. 1. the state or quality of being , or able to accomplish something with the least waste of time and effort; competency in performance. 2. accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort: The assembly line increased industry’s efficiency. […]
noun 1. a small apartment consisting typically of a combined living room and bedroom area, a bathroom, and a kitchenette. noun 1. (US) a small flat or bedsit
noun 1. a person who studies the methods, procedures, and job characteristics of a business or factory with the object of devising ways to increase the efficiency of equipment and personnel.