| vibration | 1. The act of vibrating, or the state of being vibrated, or in vibratory motion; quick motion to and fro; oscillation, as of a pendulum or musical string. "As a harper lays his open palm Upon his harp, to deaden its vibrations." (Longfellow) 2. <physics> A limited reciprocating motion of a particle of an elastic body or medium in alternately opposite directions from its position of equilibrium, when that equilibrium has been disturbed, as when a stretched cord or other body produces musical notes, or particles of air transmit sounds to the ear. The path of the particle may be in a straight line, in a circular arc, or in any curve whatever. Vibration and oscillation are both used, in mechanics, of the swinging, or rising and falling, motion of a suspended or balanced body; the latter term more appropriately, as signifying such motion produced by gravity, and of any degree of slowness, while the former applies especially to the quick, short motion to and fro which results from elasticity, or the action of molecular forces among the particles of a body when disturbed from their position of rest, as in a spring. Amplitude of vibration, the maximum displacement of a vibrating particle or body from its position of rest. Phase of vibration, any part of the path described by a particle or body in making a complete vibration, in distinction from other parts, as while moving from one extreme to the other, or on one side of the line of rest, in distinction from the opposite. Two particles are said to be in the same phase when they are moving in the same direction and with the same velocity, or in corresponding parts of their paths. Origin: L. Vibratio: cf. F. Vibration. Source: Websters Dictionary (01 Mar 1998) |
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| vibration syndrome | <syndrome> Tingling, numbness, and blanching of the fingers resulting from use of hand-held vibration tools; may persist without further exposure to vibration. (05 Mar 2000) |
| vibration tolerance | The maximum vibratory or oscillatory movements that an individual can experience and bear without pain; the limit of tolerance is a function of amplitude and frequency of the vibration and varies with the direction of application. (05 Mar 2000) |
| bursal synovitis | <pathology> Inflammation of a bursa, occasionally accompanied by a calcific deposit in the underlying supraspinatus tendon, the most common site is the subdeltoid bursa. (18 Nov 1997) |
| vaginal synovitis | <pathology> Inflammation of a tendon sheath. (18 Nov 1997) |
| chronic haemorrhagic villous synovitis | <radiology> Monoarthritis, young adults, erosions on BOTH sides of joint (!), probably inflammatory, haemosiderin deposited in synovium, articular cartilage preserved (despite extensive marginal erosions; similar to gout), NO calcification Differential diagnosis: TB (associated atrophy of muscle and bone), rheumatoid arthritis (symmetrical), synovial sarcoma (with or without calcified; outside joint), synovial osteochondromatosis (12 Dec 1998) |
| pigmented villonodular synovitis | <radiology> Monoarthritis, young adults, erosions on BOTH sides of joint (!), probably inflammatory, haemosiderin deposited in synovium, articular cartilage preserved (despite extensive marginal erosions; similar to gout), NO calcification Differential diagnosis: TB (associated atrophy of muscle and bone), rheumatoid arthritis (symmetrical), synovial sarcoma (with or without calcified; outside joint), synovial osteochondromatosis (12 Dec 1998) |
| purulent synovitis | Acute inflammation of synovial membranes, with purulent effusion into a joint, due to bacterial infection; the usual route of infection is hemic to the synovial tissue, causing destruction of the articular cartilage, and may become chronic, with sinus formation, osteomyelitis, deformity, and disability. Synonym: purulent synovitis, pyarthrosis, pyogenic arthritis, suppurative synovitis. (05 Mar 2000) |
| serous synovitis | Synovitis with a large effusion of nonpurulent fluid. (05 Mar 2000) |
| suppurative synovitis | Acute inflammation of synovial membranes, with purulent effusion into a joint, due to bacterial infection; the usual route of infection is hemic to the synovial tissue, causing destruction of the articular cartilage, and may become chronic, with sinus formation, osteomyelitis, deformity, and disability. Synonym: purulent synovitis, pyarthrosis, pyogenic arthritis, suppurative synovitis. (05 Mar 2000) |
| synovitis | <orthopaedics, rheumatology> Inflammation of a synovial membrane. It is usually painful, particularly on motion and is characterised by a fluctuating swelling due to effusion within a synovial sac. Synovitis is qualified as fibrinous, gonorrhoeal, hyperplastic, lipomatous, metritic, puerperal, rheumatic, scarlatinal, syphilitic, tuberculous, urethral, etc. (18 Nov 1997) |
| synovitis, pigmented villonodular | Outgrowths of synovial membrane composed of villi and fibrous nodules characterised histologically by haemosiderin- and lipid-containing macrophages and multinucleated giant cells. It usually occurs in the knee. (12 Dec 1998) |
| synovitis sicca | Synovitis with little serous or purulent effusion. Synonym: synovitis sicca. (05 Mar 2000) |
| dry synovitis | Synovitis with little serous or purulent effusion. Synonym: synovitis sicca. (05 Mar 2000) |
| infectious synovitis | A disease of chickens and turkeys caused by the bacterium Mycoplasma synoviae and characterised by lameness with swollen hocks and foot pads. (05 Mar 2000) |