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Definition of "lamina" []

  • A thin plate, sheet, or layer. (noun)
  • Botany The expanded area of a leaf or petal; a blade. (noun)
  • Botany The bladelike part of a kelp. (noun)
  • A thin layer of bone, membrane, or other tissue. (noun)
  • Zoology A thin scalelike or platelike structure, as one of the thin layers of sensitive vascular tissue in the hoof of a horse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "lamina" in a sentence
  • "You know the properties of thin laminae: each ray reflected from such a lamina is formed by the superposition of a ray reflected from the front side of the lamina on a ray reflected from the rear side."
  • "For each elementary colour these rays add together or subtract from one another according to a classical formula, depending on whether they are in phase or out of phase; in particular, there is extinction when the thickness of the lamina is an even multiple of one quarter of the wavelength, and there is maximum reflection when it is an odd multiple."
  • "On the inner surface of the lamina choriocapillaris is a very thin, structureless, or faintly fibrous membrane, called the lamina basalis; it is closely connected with the stroma of the choroid, and separates it from the pigmentary layer of the retina."