LAM'INA, n. [L. lamina.]

1. A thin plate or scale; a layer or coat lying over another; applied to the plates of minerals, bones, &c.

2. A bone, or part of a bone, resembling a thin plate, such as the cribriform plate of the ethmoid bone.

3. The lap of the ear.

4. The border, or the upper, broad or spreading part of the petal, in a polypetalous corol.