lamina /lam·i·na/ (lam´ĭ-nah) pl. la´minae [L.]
lamina propria,
lamina (lam´in
),
1. layer; a thin, flat plate of a larger composite structure.
2. l. of vertebra.
basal lamina
1. the layer of the basement membrane lying next to the basal surface of the adjoining cell layer, comprising two layers, the electron-lucent lamina lucida and the electron-dense lamina densa.
2. sometimes, the entire basement membrane.
3. l. basalis.
lamina basa´lis
1. one of the pair of longitudinal zones of the embryonic neural tube, from which develop the ventral gray columns of the spinal cord and the motor centers of the brain.
2. basal l. (1).
lamina basila´ris the posterior wall of the cochlear duct, separating it from the scala tympani.
Bowman's lamina see under membrane.
lamina choroidocapilla´ris the inner layer of the choroid, composed of a single-layered network of small capillaries.
lamina cribro´sa
1. fascia cribrosa.
2. (of ethmoid bone) the horizontal plate of ethmoid bone forming the roof of the nasal cavity, and perforated by many foramina for passage of olfactory nerves.
3. (of sclera) the perforated part of the sclera through which pass the axons of the retinal ganglion cells.
lamina den´sa see basal l. (1).
elastic lamina
epithelial lamina the layer of ependymal cells covering the choroid plexus.
lamina lu´cida see basal l. (1).
nuclear lamina a tightly woven meshwork that lines the nuclear side of the inner nuclear membrane; it is believed to control the shape of the nucleus.
lamina pro´pria
1. the connective tissue layer of mucous membrane.
2. the middle fibrous layer of the tympanic membrane.
lamina ra´ra lamina lucida; see basal l. (1). In the lung alveoli and renal glomeruli, one may occur on each side of the lamina densa.
reticular lamina
1. a layer of the basement membrane, adjacent to the connective tissue, seen in some epithelia.
2. l. reticularis.
lamina reticula´ris the perforated hyaline membrane covering the organ of Corti.
Rexed's laminae , spinal laminae an architectural scheme used to classify the structure of the spinal cord, based on the cytological features of the neurons in different regions of the gray substance. 
)
Rexed's laminae in a cross section of the spinal cord at approximately the level of the seventh cervical vertebra (C7).
lamina spira´lis
1. a double plate of bone winding spirally around the modiolus, dividing the spiral canal of the cochlea into the scala tympani and scala vestibuli.
2. a bony projection on the outer wall of the cochlea in the lower part of the first turn.
terminal lamina of hypothalamus the thin plate derived from the telencephalon, forming the anterior wall of the third ventricle of the cerebrum.
lamina of vertebra , lamina of vertebral arch either of the pair of broad plates of bone flaring out from the pedicles of the vertebral arches and fusing together at the midline to complete the posterior part of the arch and provide a base for the spinous process.
lamina propria,
a layer of connective tissue that lies just under the epithelium of a mucous membrane.
lamina (lam´in
),n a flat, thin plate.
lamina, dental,
n a band of epithelial tissue that connects a developing tooth bud to the oral mucosa of the oral cavity.
lamina dura,
n a radiographic term denoting the plate of compact bone (alveolar bone) that lies adjacent to the periodontal ligament.
lamina propria,
n the zone of connective tissue subjacent to the epithelium of a mucous membrane such as the
oral mucosa.
oral mucosa.
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