• WordNet 3.6
    • n lacuna an ornamental sunken panel in a ceiling or dome
    • n lacuna a blank gap or missing part
    • ***
Webster's Revised Unabridged Dictionary
    • Lacuna (Biol) A small opening; a small depression or cavity; a space, as a vacant space between the cells of plants, or one of the spaces left among the tissues of the lower animals, which serve in place of vessels for the circulation of the body fluids, or the cavity or sac, usually of very small size, in a mucous membrane.
    • Lacuna A small opening; a small pit or depression; a small blank space; a gap or vacancy; a hiatus.
    • ***
Century Dictionary and Cyclopedia
    • n lacuna A pit or hollow. Specifically— In bot.:
    • n lacuna A gap; a hiatus; especially, a vacancy caused by the omission, loss, or obliteration of something necessary to continuity or completeness.
    • n lacuna In conchology, the typical genus of Lacunidæ. L. vincta is a common New England species. This small shell resembles a periwinkle, but. is thinner and of slenderer form; it is of a reddish or brownish horn-color, with two or more darker spiral bands. It is found on the sea-shore, where the animal feeds on algals.
    • ***
Chambers's Twentieth Century Dictionary
    • n Lacuna la-kū′na a gap or hiatus
    • ***


Webster's Revised Unabridged Dictionary
L., ditch, pit, lake, orig., anything hollow. See Lagoon
Chambers's Twentieth Century Dictionary
L. lacuna, anything hollow—lacus, a lake.


In literature:

On the other hand, there were various lacunae and hypotheses in the case for the defense.
"The Big Bow Mystery" by I. Zangwill
That some such lacunae do exist is demonstrated daily by the phenomena of volcanoes.
"A History of Science, Volume 5(of 5)" by Henry Smith Williams
There then follows a lacuna.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3" by Various
There was a lacuna in the evidence against this prisoner.
"International Short Stories" by Various
At this part of the epic there is an obvious lacuna.
"Custom and Myth" by Andrew Lang
But even conventions which designedly are full of lacunae have their value.
"The Future of International Law" by Lassa Oppenheim
In addition to the median lacuna there are two lateral lacunae, one upon each side.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 7" by Various
Are we to assume a lacuna here?
"Stories and Ballads of the Far Past" by Nora Kershaw
Apellicon filled in the lacunae, and brought out a new, but faulty, edition.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2" by Various
This stanza being incomplete, I think, the lacuna is to be put after l. 838.
"Torrent of Portyngale" by Unknown
The register of the privy council, extending with some lacunae from 1539 to 1604, has been printed in thirty-two volumes.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 5" by Various
There is here, therefore, a first lacuna.
"Mentally Defective Children" by Alfred Binet
Some of these lacunae are sufficiently obvious.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6" by Various
This slab was not drawn by Carrey, who indicates a lacuna at this point.
"A Catalogue of Sculpture in the Department of Greek and Roman Antiquities, British Museum, Volume I (of 2)" by A. H. Smith
These same branches unite in front of the median lacuna to form the body of the frog.
"Artistic Anatomy of Animals" by Édouard Cuyer
The absence of a chapter on the Pope of the Century has always seemed a lacuna in the previous editions of this book.
"The Thirteenth" by James J. Walsh
The lacunae of the earlier story are here supplied.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 10" by Various
Injuries to the head not infrequently produce lacunae in the memory.
"Essays In Pastoral Medicine" by Austin ÓMalley
Walter Scott's novels were filled with lacunae.
"Library Notes" by A. P. Russell
She did not play it well but his imagination filled the lacunae; his heated mind rose to a wild ecstasy of longing.
"The Drunkard" by Cyril Arthur Edward Ranger Gull

In news:

Lacuna Coil are not to be infringed upon.
Lacuna Coil 's Cristina Scabbia Rejects the Lure of a Solo Career.
Lacuna Coil 's Cristina Scabbia Talks Road Diet.
Lacuna Coil 's Cristina Scabbia Talks Proper Diet for Life on the Road.
Watch Christina Scabbia of Lacuna Coil 's Interview with 'Heavy Metal Food.
Cristina Scabbia rocks out every time she's onstage with Lacuna Coil , and all that performing requires some proper fuel.
After a long absence, Lacuna Coil returns to Lubbock.
Lacuna Coil survives another round in the Rocktagon.
Will it be another win for Lacuna Coil or will Megadeth move on.
Lacuna Coil 's Cristina Scabbia Talks Social Networking, 'Dark Legacy' Tour.
Lacuna Coil are big into Social Networking, but it's not all about getting publicity.
Lacuna Coil 's Cristina Scabbia Philosophizes on Life in New Video Interview.
Black Veil Brides VS Lacuna Coil .
Before the main acts of the Music as a Weapon IV tour kicked off at 1st Mariner Arena last Tuesday, I had the chance to sit down with Cristina Scabbia, frontwoman and one of two lead singers of Italian rockers Lacuna Coil .
Lacuna Coil + Sevendust 2013 US Tour Dates .

In science:

One of the lacunae in was the reliance on known results for a conventional square lattice plus the reasonable assertion that the continuum limit should be isotropic.
A Six Vertex Model on a Fishnet
Assume that the chain is occupying a spherical region (lacuna) of volume Ω ∼ Rd .
Localization of Polymers in Random Media: Analogy with Quantum Particles in Disorder
Examples of the systems M S (α) include, for instance, the lacunary trigonometric systems with large lacunas, that is, with nk+1 /nk ≥ α + 1 and also ǫ-independent and asymptotically independent r.v.’s introduced by Zolotarev .
Characterizations of joint distributions, copulas, information, dependence and decoupling, with applications to time series
Equation (6) means that W acts in the linear span of the dimW basis vectors of HV that are enumerated without lacunas.
Invariant random fields in vector bundles and application to cosmology
The thin graph solution also clarifies one lacuna in the Bethe lattice approach.
Thin Animals
These lacunae provide elbow-room for theorists to speculate about more neutrino species and/or novel neutrino dynamics.
Summary of Neutrino 2000
These lacunae also provide motivations for future experiments, e.g., to improve the sensitivity to νµ → νe oscillations, to look directly for τ appearance, and to measure an oscillation pattern.
Summary of Neutrino 2000
Another lacuna of modeling in this period was realistic gas dynamics; most models used either an isothermal equation of state for the gas or ’sticky particle’ algorithms with phenomenological collision rules between particles representing gas clouds.
Galaxy Collisions - Dawn of a New Era
This result (established in our companion paper ) removes the lacuna in , which established that the family of all non-abelian simple groups other than the Suzuki groups can be made into expanders.
Approximate subgroups of linear groups