Lamina may refer to:

• Planar lamina, a 2 dimensional planar closed surface with mass and density (mathematics).
• A thin plate, sheet or layer, such as:
  • the Basal lamina, a structure of a living cell.
  • the Nuclear lamina, another structure of a living cell.
  • a Leaf, an organ of a plant.
  • Lamina -a structure in seaweeds.
• A part of the horse hoof (Laminae), connecting the walls to underlying coffin bone
• a spider genus (Desidae).