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Related to lacunal: lacunar, cicerone


 (lə-kyo͞o′nə, -ko͞o′-)
n. pl. la·cu·nae (-nē) or la·cu·nas
1. An empty space or a missing part; a gap: "self-centered in opinion, with curious lacunae of astounding ignorance" (Frank Norris).
2. Anatomy A cavity, space, or depression, especially in a bone, containing cartilage or bone cells.

[Latin lacūna; see lagoon.]

la·cu′nal adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Each is encased in a thin membrane that is in contact with sclerenchymatous tissue ventrally but with parenchymatous tissue or a larger lacunal area on its dorsal side.
In some scales each of them has a lacunal widening in the midsection of the neck (Figs 5H, 6I).