| saemicircular line | A crescentic line, not always clearly defined, which marks the lower limit of the posterior layer of the sheath of the rectus abdominis muscle. Synonym: linea arcuata vaginae musculi recti abdominis, Douglas' line, linea saemicircularis, saemicircular line. (05 Mar 2000) |
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| saemicircular line of Douglas | A crescent-shaped line that defines the end of the posterior fascial sheath of the rectus abdominis muscle. (05 Mar 2000) |
| prominence of lateral saemicircular canal | The slight bulge in the medial wall of the epitympanic recess caused by the proximity of the lateral saemicircular canal. Synonym: prominentia canalis saemicircularis lateralis. (05 Mar 2000) |
| simple crus of saemicircular duct | The non-ampullary end of the lateral saemicircular duct that opens independently into the utricle. Synonym: crus membranaceum simplex ductus saemicircularis, simple membranous limb of saemicircular duct. (05 Mar 2000) |
| epithelium of saemicircular duct | The simple squamous epithelium of the saemicircular ducts. Synonym: epithelium ductus saemicircularis. (05 Mar 2000) |
| lamina propria of saemicircular duct | The meshwork of connective tissue fibres between the saemicircular duct and the bony saemicircular canal; it encloses the perilymph in its spaces. Synonym: membrana propria ductus saemicircularis. (05 Mar 2000) |
| lateral saemicircular canals | The three bony tubes in the labyrinth of the ear within which the membranous saemicircular ducts are located; they lie in planes at right angles to each other and are known as anterior saemicircular canal, posterior saemicircular canal, and lateral saemicircular canal. Synonym: canales saemicirculares ossei. (05 Mar 2000) |
| limbs of bony saemicircular canals | The extremities of the bony saemicircular canals in which the corresponding membranous limbs of the saemicircular ducts are located; they are the common bony crus, simple bony crus, and ampullary bony crus. Synonym: crura ossea canalium saemicircularium, limbs of bony saemicircular canals. (05 Mar 2000) |
| glomerulonephritis, membranous | A disease of the glomerulus manifested clinically by proteinuria, and sometimes by other features of the nephrotic syndrome. It is histologically characterised by deposits in the glomerular capillary wall between the epithelial cell and the basement membrane and a thickening of the membrane. Also characteristic are outward projections of the membrane between the epithelial deposits in the form of "spikes". There is some agreement that the deposits are antigen-antibody complexes. (12 Dec 1998) |
| membranous | Having a thin, soft, pliable texture. (09 Oct 1997) |
| membranous ampulla | A nearly spherical enlargement of one end of each of the three saemicircular ducts, anterior, posterior, and lateral, where they connect with the utricle. Each contains a neuroepithelial crista ampullaris. Synonym: ampulla membranacea, membranous ampulla. (05 Mar 2000) |
| membranous cataract | A secondary cataract composed of the remains of the thickened capsule and degenerated lens fibres. (05 Mar 2000) |
| membranous cochlea | Spiral tube in the bony canal of the cochlea, lying on its outer wall between the scala vestibuli and scala tympani. (12 Dec 1998) |
| membranous conjunctivitis | A severe conjunctival inflammation caused by Corynebacterium diphtheriae and characterised by an infiltrating membrane which on removal leaves a raw surface. Synonym: membranous conjunctivitis. (05 Mar 2000) |
| membranous dysmenorrhoea | Dysmenorrhoea accompanied by an exfoliation of the menstrual decidua. (05 Mar 2000) |