vesica noun. ['vɛsɪkǝ, 'vi:-] Pl. -cae [-ki:]. M17.
[Latin = bladder, blister.]
1. Anatomy. A bladder. Usu. with Latin specifying word. rare. M17.
2. In full vesica piscis ['pɪskɪs], vesica piscium ['pɪskɪʌm] [Latin = fish's or fishes' bladder]. A pointed oval figure used as an architectural feature and as an aureole enclosing figures of Christ, the Virgin, etc., in medieval painting and sculpture. E19.

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