LAMELLAR 



655 



LAMINA 



one of the laminae of the < erebellum. L., Concentric, 

 one of tin: plates of bone surrounding the Havei 

 canals. L. coriaria, the part of the somatopleure from 

 which the corium and possibly the cutaneous mu 

 are developed. L., Cribriform. See Lamina 

 cribrosa. L., Fundamental or General, a general 

 term applied to all varieties of osseous lamellae. 

 L., Haversian. See L., Concentric. L., Homo- 

 geneous, the clear, apparently structureless layer of 

 an osseous lamella. L., Intermediate, one of the 

 plates tilling the spaces between the concentric layers 

 of bone. L., Interstitial. See L., Intermediate. 

 L., Investing. See L., Concentric. L medullaris, 

 the epiblastic layer forming the central nervous 

 system and organs of special sense. L., Medullary, 

 the internal lamellae forming the wall of the 

 medullary cavity of hollow hones. L. mesenterica, 

 that portion of the splanchnopleure from which the 

 mesentery, and the muscular and fibrous parts of the 

 intestines are derived. L. mucosa, that part of the 

 hypoblast from which the epithelia of the gastro- 

 intestinal tract and its glands are developed. 

 L. of Nail, an elevation on the corium, dove-tailing 

 into a furrow on the under surface of the nail. L., 

 Perineural, the perineurium. L., Periosteal or 

 Peripheral, a superficial lamella of bone lying under 

 the periosteum. L. renalis, that portion of the 

 mesoblast from which the kidneys and generative 

 organs are developed. L., Special. See £., Con- 

 centric. L., Striped, the dark portion of a bone- 

 lamella which has a striped appearance. L., Tri- 

 angular, a fibrous layer connecting the choroid 

 plexuses of the third ventricle of the brain. L., 

 Vascular. See Endockorion. 



Lamellar {lam-el'-ar) Lamellate (lam-el' '-at) [lamella, 

 a thin plate]. Having the nature of, or resembling any 

 thin, osseous or membranous tissue ; composed of lam- 

 ellae or thin plates. L. Cataract. See Cataract. 



Lamelliferous (lam-el-if'-er-us) [lamella, a thin plate ; 

 ferre, to bear]. Composed of lamellae. 



Lamelliform {lam-el' -if-orm) [lamella, a small plate; 

 forma, form]. Having the shape of a lamella. 



Lamelligerous (lam-el-ij'-er-us). See Lamelliferous. 



Lamelliped (lam-el' -ip-ed) [lamella, a small plate ; 

 pes, foot]. Having a fiat or lamelliform foot. 



Lamellose (lam'-el-os). See Lamellar. 



Lamellule (lam-el'-iil) [lamellula, dim. of lamella, a 

 plate]. A very -mall plate. 



Lameness |/(7w'-«('/) [ME., /^wr, lame]. The state of 

 being lame. L., Cross, a peculiar gait of horses in 

 which the lameness seem- to be in the leg on the 

 opposite side of the one diseased. L., Kennel, a 

 rheumatic affection of dogs. L., Uterine, weakness 

 of the uterus due to disease. 



Lamin (la'-min) [laminum, the dead-nettle]. An 

 alkaloid said to exist in Lamium album, </. v. 



Lamina (lam' -in-ah) [I.., a plate or scale: pi. , Lm»i- 

 ina\. A descriptive term used to designate foliated 

 structure. Also, any thin layer of bone, membrane, 

 or other tissue. L., Arcuate [of the cerebellum), 

 a bundle of fibers uniting the contiguous convolutions 

 of the cerebellum. L., Arcuate {of the cerebrum), 

 a band of fibers uniting adjacent convolutions of 

 the cerebrum. L. ascendens [of the palate bone), 

 the vertical plate of the palate. L. axilis, the primi- 

 tive streak of the blastoderm. L., Basal [of the 

 placenta), the decidua serotina. L., Bowman's, the 

 structureless membrane between the anterior layers 

 of epithelium and the fibrous ti-sue of the cornea of 

 the eye. L. cacuminis, a narrow band connecting 

 the posterior superior lobes of the cerebellum. L. 

 of Cerebellum, the layers- of white matter, covered 



externally with gray substance, that arise from the cen- 

 tral white a.\i.-> of the cerebellum. L. chrotalis, 

 the dermal plate or covering. L. cinerea, the 

 connecting layer of gray matin- between the corpus 

 callosum and the optic chiasma ; the terma. L. cinerea 

 convoluta, the tuber cinereum. L. conarii, the 

 lower lamella of the n the pineal gland. 



L. concharum, the inner surface of the lateral 

 mas-i :s of tin- ethmoid bone. L. connectens, the 

 posterior cerebral commissure. L. connectiva, 

 the collodcrma , q.v. L. cortis, the membrana tectoria 

 of the internal ear. L. cornea, a thickened band 

 of the ependyma of the lateral ventricle covering 

 the tenia semicircularis. L., Cribriform, the crib- 

 riform plate of the ethmoid. See also L. crib- 

 rosa of the Temporal Bone. L. cribrosa [of the 

 choroid), in lower animals that portion of the 

 choroid which is perforated for the passage of the 

 optic nerve. L. cribrosa [of the fascia lata), the 

 cribriform fascia covering the saphenous opening. 

 L. cribrosa anterior, the anterior perforated space. 

 L. cribrosa anterior inferior, the anterior part of 

 the inferior fossula, through which branches of the 

 cochlear nerve pass. L. cribrosa media, the middle 

 part of the inferior fossula transmitting the branches 

 of the auditory nerve going to the saccule. L. 

 cribrosa posterior, the posterior perforated space. 

 L. cribrosa of the Sclerotic, the perforated lamina 

 through which the optic nerve enters the globe of 

 the eye. L. cribrosa of the Temporal Bone, a 

 small laminated bone forming the boundary of the 

 internal auditor} meatus. L. of the Cricoid 

 Cartilage, the fiat posterior plate of the cricoid car- 

 tilage. L., Crystalline, the anterior part of the cap- 

 sule of the crystalline lens. L. dentata, the dentate 

 fascia. L. denticulata, the covering of the outer 

 fifth of the vestibular surface of the bony cochlea, 

 from which delicate teeth-like elevations project 

 into the scala vestibuli. L. dorsalis, one of the 

 two ridges bordering the medullary groove, that 

 unite to form a canal which finally develops into 

 the cerebro-spinal canal. See Plates, Medullary. L., 

 External Medullary, the outer of the two white 

 layers of the lenticular nucleus. L., Fibro- 

 cutaneous, the parietal mesoblast. L., Fibrointesti- 

 nal, the visceral mesoblast. L. fusca, the pig- 

 mentary tissue of the sclera forming the ectal layer 

 of the perichoroidal sinus. L. gastralis, the gastro- 

 derma, q. v. L., Gray. See L. cinerea. L. grisea, 

 the gray matter of the spinal cord. L., Internal 

 Medullary, the inner of the two white layers of the 

 lenticular nucleus. L., Lateral (of the sphenoid bone), 

 the external pterygoid plate. L. lentis, one of the 

 layers of the crystalline lens. L. mastoidea, the basal 

 plate of the mastoid process of the temporal bone. L.. 

 Median (of the sphenoid bone), the internal pterygoid 

 plate. L. medullaris media cerebelli, the valve of 

 Vieussens. L. medullaris thalami, a layer of white 

 matter between the optic thalamus and the internal nu- 

 cleus of the striate body. L. medullaris transversa, 

 a delicate layer of gray matter covering the a< ]iieduct of 

 Sylvius. L. medullaris triangularis, the lyra of the 

 fornix. L. modioli, the bony lamina spiralis oi the coch- 

 lea. L. muscularis, the myoderma, </. v. L. nervea 

 involvens. a delicate layer of nerve-matter covering the 

 ventricular surface of the ependyma. L. neuroder- 

 malis, the epiblast. L.. Nuclear, the nuclear layer. 

 L. palatina, the horizontal plate of the palate bone. 

 L. papyracea, the os planum of the ethmoid bone. 

 L. pedunculorum, one of the layers of which the 

 crura cerebri are composed. L. perforata, either 

 perforated space. L. pigmenti, a delicate layer of 



