Definify.com
Webster 1913 Edition
Lamina
1.
A thin plate or scale; a layer or coat lying over another; – said of thin plates or platelike substances, as of bone or minerals.
2.
(Bot.)
The blade of a leaf; the broad, expanded portion of a petal or sepal of a flower.
Gray.
3.
(Zool.)
A thin plate or scale; specif., one of the thin, flat processes composing the vane of a feather.