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Lamella (zoology), a gill-shaped structure found within the respiratory organs or bone or nacre of an animal.

Lamella (mycology), a "gills" or leaf-shaped hymenophore structure beneath the pileus of an agaric.

Lamella (materials), a layered plate-like structure within geological, biological, or synthetic materials, for example mica and graphite.

Lamella (cell biology), a cell structure associated with cellular motility.

Lamella, in anatomy, is a portion of compact bone, used in anchoring.