Lamina

(n.) A thin plate or scale; a layer or coat lying over another; -- said of thin plates or platelike substances, as of bone or minerals.

Lamina - Other Definitions

(n.) A thin plate or scale; a layer or coat lying over another; -- said of thin plates or platelike substances, as of bone or minerals.
(n.) The blade of a leaf; the broad, expanded portion of a petal or sepal of a flower.
(n.) A thin plate or scale; specif., one of the thin, flat processes composing the vane of a feather.