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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. 2018.
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British Dictionary definitions for lacuna


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 lacuna

"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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lacuna 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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