lam·i·na

(lăm′ə-nə)

n. pl. lam·i·nae (-nē′) or lam·i·nas

1. A thin plate, sheet, or layer.

2. Botany

a. The expanded area of a leaf or petal; a blade.

b. The bladelike part of a kelp.

3. A thin layer of bone, membrane, or other tissue.

4. Zoology A thin scalelike or platelike structure, as one of the thin layers of sensitive vascular tissue in the hoof of a horse.

5. Cytology A thin layer inside the nuclear membrane of a cell that is composed of a meshlike network of protein fibers.

6. Geology A narrow bed of rock.

[Latin lāmina.]

lam′i·nar, lam′i·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.

lamina

(ˈlæmɪnə)

n, pl -nae (-ˌniː) or -nas

1. a thin plate or layer, esp of bone or mineral

2. (Geological Science) a thin plate or layer, esp of bone or mineral

3. (Anatomy) a thin plate or layer, esp of bone or mineral

4. (Botany) botany the flat blade of a leaf, petal, or thallus

[C17: New Latin, from Latin: thin plate]

ˈlaminar, ˈlaminary, laminose, laminous adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

lam•i•na

(ˈlæm ə nə)

n., pl. -nae (-ˌni)
-nas.

1. a thin plate or layer.

2. a thin layer or coating lying over another, as in certain minerals.

3. the blade or expanded portion of a leaf.

[1650–60; < Latin lāmina]

lam·i·na

(lăm′ə-nə)

1. Botany The expanded area of a leaf or petal; a blade.

2. A thin layer of bone, membrane, or other tissue.

3. Geology A thin layer of sediment.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

lamina - a thin plate or layer (especially of bone or mineral)

lamina arcus vertebrae - lamina of the vertebral arch; the flattened posterior part of the vertebral arch from which the spinous process extends

plate - any flat platelike body structure or part

lamina

noun

A thin outer covering of an object:

membrane, sheath, sheathing, skin.

Translations

lame

lemezlevéllemez

lamina

lam·i·na

n. L. lámina, placa o capa fina;

___ arcus vertebrae → ___ del arco vertebral;

___ basalis choroidae → ___ basal de la coroide;

___ limitans anterior corneae → ___ elástica anterior de la córnea;

___ limitans posterior corneae → ___ elástica posterior de la córnea;

___ multiform of cerebral cortex → ___ multiforme de la corteza cerebral.

English-Spanish Medical Dictionary © Farlex 2012

Mentioned in

References in periodicals archive

(2) These tumors are thought to arise from either extraosseous remnants of dental lamina or the basal cell layer of surface epithelium, which is believed to have odontogenic potential.

Extra-gingival peripheral ameloblastoma

Ameloblastoma commonly occurs in the posterior mandible (80%) and to a lesser extent in the posterior maxilla (20%).5,6 It usually affects adults in the 4th - 5th decades of life.7 The etiology is not known.8 It may arise from rests of dental lamina, from a developing enamel organ, from the epithelial lining of an odontogenic cyst, or from the basal cells of the oral mucosa.9

CD10 EXPRESSION IN AMELOBLASTOMA VARIANTS

1) a weak cytoplasmic expression of [beta]-catenin is present in the dental lamina and the oral epithelium, as well as in the mesenchyme.

Expression of Wnt and [beta]-Catenin in Mouse Tooth Germs and Chick Facial Primordia: A Comparison/ Expresion de Wnt y [beta]-Catenina en Germenes de Dientes de Raton y Primordios Faciales de Polluelos: Una Comparacion

This species has three ontogeny stages before it reaches its adult stage: 1) Ammocoete (subcutaneous eyes, oral opening with folded lips, without marginal papillae, gill area arranged as furrow with seven undeveloped openings, and a brown colored body), 2) Macroftalmia (developed eyes, inner mouth with fleshy lips and supra and infraoral dental lamina, gill openings exposed to the outside and a dark silver dorsal and ventral body coloration), 3) Hypermetamorphic (semicircular mouth opening, with oral and supra-oral odontoid pieces well-developed, eyes relatively small and covered by translucent membrane, gill opening with folds on each edge, developed dorsal fins, a silver body coloration and a bluish pigmentation on the fins) (Ruiz & Marchant, 2004).

Predation of Aegla denticulata (Crustacea, Aeglidae) upon the ammocoetes stage of Geotria australis (Chordata, Petromyzontidae) in a confined environment

Supernumerary tooth (ST) is defined as a tooth or a structure resembling tooth which forms from dental lamina in addition to the normal dental formula [1, 2].

Nonsyndromic Bilateral Posterior Maxillary Supernumerary Teeth: A Report of Two Cases and Review

In the same region, following the formation of the dental lamina, Fgf8, Fgf9, Fgf15, and Fgf20 are expressed, while the expression of Fgf10 in the epithelium is decreased [63].

The Role of Fibroblast Growth Factors in Tooth Development and Incisor Renewal

According to the present concept, cases reported in literature under the terms "odontogenic gingival epithelial hamartoma" "hamartoma of the dental lamina" and "peripheral ameloblastic fibrodentinoma" are actually examples of peripheral odontogenic fibroma.

Peripheral Ossifying Fibroma: A Very Rare Clinical Presentation

Various genetic factors, an exchange in the position of the forming dental lamina along with trauma to the deciduous tooth with the permanent incisor root dilaceration, were suggested as reasons for transposition.

Bilateral transposition--a rare case with a literature review/Bilateral transpozisyon--literatur taramasi esliginde nadir bir vaka

Their presence in odontogenic cysts and tumors has been related to their derivation from the remnants of the dental lamina and rest of Malassez which are known to have glycogen-rich clear cells as a typical feature [3, 8].

Benign cystic tumor of the mandible. A case report and literature review

Remnants of dental lamina could be the basis from which BOC arises because of histologic similarities between dental lamina and the cyst wall, which is characterized by the presence of glycogen rich clear cells that are found both in dental lamina and in the cyst wall (4).

Botryoid cyst, a rare type of odontogenic cyst

Odontoma is a tumor composed of osseous tissue and develops from budding of extra-odontogenic epithelial cells from dental lamina. It may occupies a position anywhere in mandible or maxilla but mostly the alveolar process of lower jaw is involved (Singh et al., 1993).

Surgical Management of Odontoma in Bovines

Background and Objectives: Keratocystic odontogenic tumor (KCOT) is a fairly common oral and maxillofacial lesion that is derived from remnants of the dental lamina. It grows rapidly, has an aggressive behavior and hence invades the adjacent tissues.

ROLE OF OBTURATOR IN CONSERVATIVE MANAGEMENT OF KERATOCYSTIC ODONTOGENIC TUMOR WITH MARSUPIALIZATION IN A YOUNG ADULT