b. A plant which ‘sets’ or develops fruit; only with adjective as good setter, bad setter.
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the world > plants > part of plant > reproductive part(s) > fruit or reproductive product > plant that bears fruit > [noun]
setter1888
1888 M. T. Masters in Encycl. Brit. XXIV. 237/2 Some..varieties [of the vine] are, as gardeners say, ‘bad setters’,—i.e. do not ripen their fruit owing to imperfect fertilization.