stone (n.)
testicle
MW I.iv.109[Caius to himself, of Evans] I will cut all his two stones [i.e. castrate him]
RJ I.iii.54[Nurse to Lady Capulet, of Juliet as a baby] it had upon it brow / A bump as big as a young cockerel's stone
Tim II.ii.114[Fool to Varro's Servant, of a whoremaster] Sometime't appears ... like a philosopher, with two stones more than's artificial one [i.e. the philosopher's stone]
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