Lacuna

A small pit, cavity, defect or gap.
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1. [TA] A small space, cavity, or depression. 2. A gap or defect. 3. An abnormal space between strata or between the cellular elements of the epidermis. 4. SYN: corneal space. [L. a pit, dim. of lacus, a hollow, a lake]
- cartilage l. a cavity within the matrix of cartilage, occupied by a chondrocyte. SYN: cartilage space.
- cerebral l. a small circumscribed loss of brain tissue caused by occlusion of one of the small penetrating arteries. SYN: l. cerebri.
- l. cerebri SYN: cerebral l..
- Howship lacunae tiny depressions, pits, or irregular grooves in bone that is being resorbed by osteoclasts. SYN: resorption lacunae.
- intervillous l. one of the blood spaces in the placenta into which the chorionic villi project.
- lateral lacunae [TA] SYN: lateral lacunae of superior sagittal sinus.
- lacunae laterales [TA] SYN: lateral lacunae of superior sagittal sinus.
- lateral lacunae of superior sagittal sinus [TA] lateral expansions of the superior sagittal sinus of the dura mater, often increasing in width with advancing age until, in the very old, they may extend two cm lateral to the midline; the endothelium-lined lumens of the lacunae are usually reduced to a spongelike labyrinth by numerous arachnoid granulations and dural trabeculae. SYN: lacunae laterales [TA], lateral lacunae [TA], lateral lakes, lateral venous lacunae, parasinoidal sinuses.
- lateral venous lacunae SYN: lateral lacunae of superior sagittal sinus.
- l. magna a recess on the roof of the fossa navicularis of the penis, formed by a fold of mucous membrane, the valve of the navicular fossa.
- Morgagni l. SYN: urethral l..
- muscular l. SYN: muscular space of retroinguinal compartment.
- l. musculorum SYN: muscular space of retroinguinal compartment.
- l. musculorum retroinguinalis SYN: muscular space of retroinguinal compartment.
- osseous l. a cavity in bony tissue occupied by an osteocyte.
- pharyngeal l. a depression near the pharyngeal opening of the pharyngotympanic (auditory) tube. SYN: l. pharyngis.
- l. pharyngis SYN: pharyngeal l..
- resorption lacunae SYN: Howship lacunae.
- trophoblastic l. one of the spaces in the early syncytiotrophoblastic layer of the chorion before the formation of villi; in human embryos maternal blood enters these spaces by the 10th day; with the differentiation of the chorionic villi they become intervillous spaces, sometimes called intervillous lacunae.
- urethral l. [TA] one of a number of little recesses in the mucous membrane of the spongy urethra into which empty the ducts of the urethral glands. SYN: l. urethralis [TA], Morgagni l..
- l. urethralis, pl.lacunae urethrales [TA] SYN: urethral l..
- vascular l. SYN: vascular space of retroinguinal compartment.
- l. vasorum SYN: vascular space of retroinguinal compartment.
- l. vasorum retroinguinalis [TA] SYN: vascular space of retroinguinal compartment.

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la·cu·na lə-'k(y)ü-nə n, pl la·cu·nae -'kyü-(.)nē, -'kü-.nī a small cavity, pit, or discontinuity in an anatomical structure: as
a) one of the follicles in the mucous membrane of the urethra
b) one of the minute cavities in bone or cartilage occupied by the osteocytes
la·cu·nar -'k(y)ü-nər adj

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n. (pl. lacunae)
(in anatomy) a small cavity or depression; for example, one of the spaces in compact bone in which a bone cell lies.

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la·cu·na (lə-kuґnə) gen. and pl. lacuґnae [L.] 1. a small pit or hollow cavity, such as one within or between other body structures. 2. a defect or gap, as in the field of vision (scotoma). lacunar adj

Medical dictionary. 2011.

Look at other dictionaries:

  • lacună — LACÚNĂ, lacune, s.f. Spaţiu gol în interiorul unui corp; gol, lipsă în continuitatea, în integritatea unui lucru. ♦ Întrerupere involuntară şi penibilă într un text, în înlănţuirea unor fapte, a unor idei. ♦ fig. Ceea ce lipseşte pentru ca un… …   Dicționar Român

  • LACUNA — (лат. лужа, болото, углубление, наполненное водой). Lacuna magna углубление в ладьеобразной ямке, fossa na vicularis urethrae, расширенной части мужского мочеиспускательного канала в головке полового члена. Lacunae urethrales Mor gagnii… …   Большая медицинская энциклопедия

  • lacuna — index hiatus, split Burton s Legal Thesaurus. William C. Burton. 2006 lacuna …   Law dictionary

  • lacuna — s.f. [dal lat. lacuna laguna; cavità; mancanza ]. 1. a. [soluzione di continuità, spazio vuoto] ▶◀ interruzione, (non com.) vacuo, vuoto. b. [il mancare, il non essere sufficiente: colmare una l. ; l. legislativa ] ▶◀ assenza, (fam.) buco (la sua …   Enciclopedia Italiana

  • lacuna — blank or missing portion in a manuscript, 1660s, from L. lacuna hole, pit, dim. of lacus pond, lake (see LAKE (Cf. lake) (1)). The Latin plural is lacunae. Related: Lacunal; lacunar; lacunose …   Etymology dictionary

  • lacuna — s. f. 1. Espaço em vão ou em branco. 2. Interrupção. 3. Intervalo. 4. Falta, omissão. 5.  [Anatomia] Cavidade onde se reúnem vários folículos das mucosas. 6.  [Botânica] Espaço intercelular.   ‣ Etimologia: latim lacuna, ae, cisterna, fosso,… …   Dicionário da Língua Portuguesa

  • Lacuna — La*cu na (l[.a]*k[=u] n[.a]), n.; pl. L. {Lacun[ae]} (l[.a]*k[=u] n[ae]); E. {Lacunas} (l[.a]*k[=u] n[.a]z). [L., ditch, pit, lake, orig., anything hollow. See {Lagoon}.] 1. A small opening; a small pit or depression; a small blank space; a gap… …   The Collaborative International Dictionary of English

  • Lacuna — Lacuna, lat., Graben. Vertiefung, Sumpf; Lücke, besonders in dem Contexte der alten Autoren …   Herders Conversations-Lexikon

  • Lacuna — vgl. Lakune …   Das Wörterbuch medizinischer Fachausdrücke

  • lacuna — gap, hiatus, *break, interruption, interval, interim …   New Dictionary of Synonyms

  • lacuna — ► NOUN (pl. lacunae or lacunas) 1) a gap or missing portion. 2) Anatomy a cavity or depression, especially in bone. DERIVATIVES lacunar adjective. ORIGIN Latin, pool …   English terms dictionary

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