(1880-1958) a British scientist who in 1921 started the first clinic (=a place where people can go for medical treatment and advice) offering practical help with birth control (=methods for controlling the number of children you have). She also wrote two popular books about sex education. At the time, her work was strongly criticized and opposed by the Roman Catholic Church and by many doctors with traditional opinions.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.
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