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[luh-kyoo-nuh] /ləˈkyu nə/
noun, plural lacunae
[luh-kyoo-nee] /ləˈkyu ni/ (Show IPA),
a gap or missing part, as in a manuscript, series, or logical argument; hiatus.
Anatomy. one of the numerous minute cavities in the substance of bone, supposed to contain nucleate cells.
Botany. an air space in the cellular tissue of plants.
Origin of lacuna
1655-65; < Latin lacūna ditch, pit, hole, gap, deficiency, akin to lacus vat, lake1. Cf. lagoon Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for lacunae
Historical Examples
  • We must also not forget that there are lacunae in the childs comprehension of what it perceives.

    Criminal Psychology Hans Gross
  • Therefore the lacunae I've undertaken to fill out are the national wants.

    The Tragic Muse Henry James
  • These lacunae were so serious that his plastic vision, often of great beauty, could not compensate for them.

    An Autobiography Igor Stravinsky
  • But even conventions which designedly are full of lacunae have their value.

  • And our only tolerable attitude is that of learners constantly seeking to fill up the lacunae in our beliefs and practice.

    Our Lady Saint Mary J. G. H. Barry
  • Apellicon filled in the lacunae, and brought out a new, but faulty, edition.

  • About a fourth, comprehending with lacunae the first portion of the dialogue, is preserved in several MSS.

    Timaeus Plato
  • These errors and these lacunae are serious, however they originate, as the public is beginning to realise.

    The Forerunners Romain Rolland
  • The letters and wood-cuts suffering from lacunae had been reformed with great skill on a new foundation.

  • She did not play it well but his imagination filled the lacunae; his heated mind rose to a wild ecstasy of longing.

    The Drunkard Cyril Arthur Edward Ranger Gull
British Dictionary definitions for lacunae


noun (pl) -nae (-niː), -nas
a gap or space, esp in a book or manuscript
(biology) a cavity or depression, such as any of the spaces in the matrix of bone
another name for coffer (sense 3)
Derived Forms
lacunose, lacunal, lacunary, adjective
lacunosity (ˌlækjʊˈnɒsɪtɪ) noun
Word Origin
C17: from Latin lacūna pool, cavity, from lacus lake
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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Word Origin and History for lacunae

plural of lacuna (q.v.).



"blank or missing portion in a manuscript," 1660s, from Latin lacuna "hole, pit," diminutive of lacus "pond, lake" (see lake (n.1)). The Latin plural is lacunae. Related: Lacunal; lacunar; lacunose.

Online Etymology Dictionary, © 2010 Douglas Harper
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lacunae in Medicine

lacuna la·cu·na (lə-kyōō'nə)
n. pl. la·cu·nas or la·cu·nae (-nē)

  1. An anatomical cavity, space, or depression, especially in a bone.

  2. An empty space or a missing part; a gap; a defect.

  3. An abnormal space between the strata or between the cellular elements of the epidermis.

  4. See corneal space.

la·cu'nal 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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