| periligamentous | 1. Surrounding a ligament. 2. Relating to the peridesmium. Synonym: periligamentous. (05 Mar 2000) |
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| perilimbal suction cup | A device for increasing intraocular pressure by impeding circulation and aqueous humor flow from the eye. (05 Mar 2000) |
| perilla | <botany> A genus of labiate herbs, of which one species (Perilla ocimoides, or P. Nankinensis) is often cultivated for its purple or variegated foliage. Origin: Etymol. Uncertain. Source: Websters Dictionary (01 Mar 1998) |
| perilunar dislocation | Dislocation of carpal bones around the lunate, which remains in relation to the radius; distinguish from dislocation of lunate, Kienbock's dislocation. (05 Mar 2000) |
| perilunate dislocation | <radiology> Lunate remains aligned with radius, capitate dislocates (usually posteriorly), more common than lunate dislocation (radial-lunate ligaments stronger than lunate-capitate ligaments), associated with scaphoid fractures (75%) = transscaphoid perilunate dislocation (12 Dec 1998) |
| perilymph | <anatomy> The fluid which surrounds the membranous labyrinth of the internal ear, and separates it from the walls of the chambers in which the labyrinth lies. Source: Websters Dictionary (01 Mar 1998) |
| perilympha | Synonym: perilymph. Origin: peri-+ L. Lympha, a clear fluid (lymph) (05 Mar 2000) |
| perilymphangial | <anatomy> Around, or at the side of, a lymphatic vessel. Source: Websters Dictionary (01 Mar 1998) |
| perilymphangitis | Inflammation of the tissues surrounding a lymphatic vessel. (05 Mar 2000) |
| perilymphatic | <anatomy> Pertaining to, or containing, perilymph. Alternative form: perilymphangial. Source: Websters Dictionary (01 Mar 1998) |
| perilymphatic duct | A fine canal connecting the perilymphatic space of the cochlea with the subarachnoid space. Synonym: ductus perilymphaticus, aqueductus cochleae, cochlear aqueduct. (05 Mar 2000) |
| perilymphatic space | Space between the bony and membranous portions of the labyrinth. Synonym: spatium perilymphaticum, cisterna perilymphatica. (05 Mar 2000) |
| perimeningitis | <medicine> Inflammation of the dura mater or outer membrane of the brain. Origin: Pachy- + meningitis. Source: Websters Dictionary (01 Mar 1998) |
| perimenopause | The three to five year period prior to menopause during which oestrogen levels begin to drop.Studies have revealed that oestrogen replacement therapy may be more effective if started during perimenopause, particularly in preventing bone loss, which immediately accelerates as soon as overall oestrogen is reduced. For the bone-saving benefits of oestrogen replacement therapy to be seen during the period between age 70 and 80, when the risk of breakage is high, it apparently must be begun during perimenopause and continued for many years. (05 Mar 2000) |
| perimeter | 1. <geometry> The outer boundary of a body or figure, or the sum of all the sides. 2. An instrument for determining the extent and shape of the field of vision. Origin: Gr.; around + measure: cf. F. Perimetre. Source: Websters Dictionary (01 Mar 1998) |