Capable of becoming erect or rigid, especially referring to bodily tissues that can fill with blood. Most commonly used in medical contexts regarding sexual function.
From Latin 'erectus' (upright, elevated) plus the suffix '-ile' (capable of). The medical usage developed in the 17th century as anatomical knowledge advanced. The word 'erect' comes from Latin 'erigere' meaning 'to set up' or 'raise.'
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