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operculum medical definition

noun pl. o·per·cu·lums or o·per·cu·la
  1. Something resembling a lid or cover.
  2. The portions of the frontal, parietal, and temporal lobes covering the insula.
  3. The mucus sealing the endocervical canal of the uterus after conception.
  4. The attached flap in cases of torn retinal detachment.
  5. The mucosal flap partially or completely covering an unerupted tooth.

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