vesicapiscis

vesica pis·cis (pīʹsĭs, pĭsʹĭs) n.

A pointed oval shape used in medieval Christian art as an aureole to surround a sacred figure.

  [New Latin vēsīca piscis: Latin vēsīca, bladder + Latin piscis, genitive of piscis, fish (from the resemblance in shape).]

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