The Collaborative International Dictionary of English v.0.48:
Lamella \La*mel"la\, n.; pl. L. Lamell[ae], E. Lamellas. [L. lamella, dim. of lamina plate, leaf, layer: cf. F. lamelle. Cf. Lamina, Omelet.] A thin plate or scale of anything, as a thin scale growing from the petals of certain flowers; or one of the thin plates or scales of which certain shells are composed. [1913 Webster] Lamellar