lacuna


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Related to lacuna: lacuna vasorum

lacuna

 [lah-ku´nah] (L.)
1. a small pit or hollow cavity.
2. a defect or gap, as in the field of vision (scotoma). adj., adj lacu´nar.
absorption lacuna resorption lacuna.
bone lacuna a small cavity within the bone matrix, containing an osteocyte, and from which slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.
cartilage lacuna any of the small cavities within the cartilage matrix, containing a chondrocyte.
Howship's lacuna resorption lacuna.
intervillous lacuna one of the spaces of the placenta occupied by maternal blood, into which the fetal villi project.
osseous lacuna bone lacuna.
lacuna pharyn´gis a depression of the pharyngeal end of the eustachian tube.
resorption lacuna a pit or concavity found in bones undergoing resorption, frequently containing osteoclasts. Similar lacunae also may be found in eroding surfaces of cementum.

la·cu·na

, pl.

la·cu·nae

(lă-kū'nă, -kū'nē),
1. 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. Synonym(s): corneal space
[L. a pit, dim. of lacus, a hollow, a lake]

lacuna

/la·cu·na/ (lah-ku´nah) pl. lacu´nae   [L.]
1. a small pit or hollow cavity.
2. a defect or gap, as in the field of vision (scotoma).lacu´nar

absorption lacuna  resorption l.
bone lacuna  a small cavity within the bone matrix, containing an osteocyte; from it slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.
cartilage lacuna  any of the small cavities within the cartilage matrix, containing a chondrocyte.
Howship's lacuna  resorption l.
intervillous lacuna  one of the blood spaces of the placenta in which the fetal villi are found.
lateral lacunae  venous meshworks within the dura mater on either side of the superior sagittal sinus.
osseous lacuna  bone l.
lacuna pharyn´gis  a depression at the pharyngeal end of the eustachian tube.
resorption lacuna  a pit or groove in developing bone that is undergoing resorption; frequently found to contain osteoclasts.
trophoblastic lacuna  intervillous l.

lacuna

(lə-kyo͞o′nə, -ko͞o′-)
n. pl. lacu·nae (-nē) or lacu·nas
Anatomy A cavity, space, or depression, especially in a bone, containing cartilage or bone cells.

la·cu′nal adj.

lacuna

[ləkyo̅o̅′nə] pl. lacunae
Etymology: L, pit
1 a hollow within a structure, especially bony tissue, in which lie osteoblasts.
2 a gap, as in the field of vision.
Histology A small, hollow chamber that houses an osteocyte in mature bone tissue or a chondrocyte in cartilage tissue
Medspeak A small pit, cavity, defect or gap

la·cu·na

, pl. lacunae (lă-kū'nă, -nē)
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. Synonym(s): corneal space.

lacuna

Any empty space, missing part, cavity or depression.

lacuna

a cavity or depression, for example, one of many small spaces between the lamellae of bones that is occupied by individual bone cells. Small canals (canaliculi) radiate from the lacunae and in these are small protoplasmic processes which connect with the osteoblasts in other lacunae. see HAVERSIAN CANAL.

la·cu·na

, pl. lacunae (lă-kū'nă, -nē)
1. [TA] Small space, cavity, or depression.
2. Gap or defect.
3. Abnormal space between strata or between the cellular elements of the epidermis.

lacuna (ləkoo´nə),

n a term used in anatomic nomenclature to designate a small hollow cavity or pit.
lacuna, absorption (Howship's lacuna),
n an area (pit) of bone resorption, usually irregular in outline, and often containing osteoclasts.
lacuna, osteocyte,
n a hollow cavity within bone, containing osteocytes, from which canaliculi, containing protoplasmic processes of the osteocytes, radiate.

lacuna

pl. lacunae [L.]
1. a small pit or hollow cavity.
2. a defect or gap, as in the field of vision (scotoma).

absorption lacuna
a pit or groove in developing bone that is undergoing resorption; frequently found to contain osteoclasts.
bone lacuna
a small cavity within the bone matrix, containing an osteocyte, and from which slender canaliculi radiate and penetrate the adjacent lamellae to anastomose with the canaliculi of neighboring lacunae, thus forming a system of cavities interconnected by minute canals.
cartilage lacuna
any of the small cavities within the cartilage matrix, containing a chondrocyte.
Howship's lacuna
the concave cavities which are formed by osteoclasts in the process of bone resorption.
osseous lacuna
bone lacuna (see above).
osteocytic lacuna
see bone lacuna (above).
urethral lacuna
numerous small depressions or pits in the mucous membrane of the urethra.
vascular lacuna
a breach in any membrane or other tissue which is navigated by blood vessels.
References in periodicals archive ?
Countryside has ensured that the living space at Lacuna is contemporary and highly luxurious, perfect for a modern-day lifestyle.
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MUZAFFARABAD, February 25, 2011 (Frontier Star): High Court Azad Kashmir has abolished constitutional lacuna in appointment of new judges who would be appointed on Friday.
AWARD-WINNING housebuilder Country-side Properties has recently launched its show home at Lacuna - its exclusive development overlooking Cardiff Bay.
It is a real service to the English-speaking world, then, that Hanlon has filled a large lacuna.
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Aiming to end the country's Olympic medal drought, flag-bearer Ian Lariba of table tennis led the first batch together with taekwondo jin Elaine Alora, swimmer Jessie Khing Lacuna, long jumper Marestella Torres-Sunang and weightlifters Hidilyn Diaz and Nestor Colonia.
Andrew Biggs, sales manager for Countryside Properties Housebuilding Division, said: "One would never be short of things to do at Lacuna.
In this context, one can point to a perilous lacuna shared by both authors; it is not that each leaves out an important critical article on the subject.