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[luh-mel-uh] /ləˈmɛl ə/
noun, plural lamellae
[luh-mel-ee] /ləˈmɛl i/ (Show IPA),
a thin plate, scale, membrane, or layer, as of bone, tissue, or cell walls.
  1. an erect scale or blade inserted at the junction of the claw and limb in some corollas and forming a part of their corona or crown.
  2. (in mosses) a thin sheet of cells standing up along the midrib of a leaf.
Mycology. gill1 (def 2).
Building Trades. a member of wood, metal, or reinforced concrete, joined in a crisscross pattern with other lamellae to form a vault.
Ophthalmology. a small disk of gelatin and glycerin mixed with a medicinal substance, used as a medicament for the eyes.
Origin of lamella
1670-80; < Latin lāmella, diminutive of lāmina lame2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for lamellae


noun (pl) -lae (-liː), -las
a thin layer, plate, or membrane, esp any of the calcified layers of which bone is formed
  1. any of the spore-bearing gills of a mushroom
  2. any of the membranes in a chloroplast
  3. Also called middle lamella. a layer of pectin cementing together adjacent cells
one of a number of timber, metal, or concrete members connected along a pattern of intersecting diagonal lines to form a framed vaulted roof structure
any thin sheet of material or thin layer in a fluid
Derived Forms
lamellar, lamellate (ˈlæmɪˌleɪt; -lɪt; ləˈmɛleɪt; -lɪt), lamellose (ləˈmɛləʊs; ˈlæmɪˌləʊs) adjective
lamellarly, lamellately, adverb
lamellated, adjective
lamellation, noun
lamellosity (ˌlæməˈlɒsɪtɪ) noun
Word Origin
C17: New Latin, from Latin, diminutive of lāmina thin plate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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lamellae in Medicine

lamella la·mel·la (lə-měl'ə)
n. pl. la·mel·las or la·mel·lae (-měl'ē')

  1. A thin scale, plate, or layer of bone or tissue, as around the minute vascular canals in bone.

  2. A medicated gelatin disk, used instead of a solution for application to the conjunctiva. Also called disk.

la·mel'lar adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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