·noun The blade of a leaf; the broad, expanded portion of a petal or sepal of a flower.
II. Lamina ·noun A thin plate or scale; specif., one of the thin, flat processes composing the vane of a feather.
III. Lamina ·noun A thin plate or scale; a layer or coat lying over another;
— said of thin plates or platelike substances, as of bone or minerals.