concussion

(kon-kush'un) [L. concuiere, to shal together.] i. violent shaking or jarring. An injury of a soft structure, as the brain, resul' ing from a blow or violent shaking; commot i cer'ebral c, c. of the brain, commotio cerebi c. of the ret'ina, commotio retinae, spi'nal c 223 of the spine, an injury of the spinal cord caused, y a violent jarring, marked by neurasthenic Srmptoms, muscular atrophy, and central and eripheral pains railway spine. A; cu 'oT. hammer-like instrument for tapping le parts as a form of ma age. + dens at i on (kon-den-sa's hun) [L. con-, together, ensare, to make thick.] i. Compre ion, makig more solid or dense. 2. The change of a gas 3 a liquid, or of a liquid to a solid. 3. In sychoanalysis a proce of energy-sparing by taking one symbol stand for a number of others. Making one part of a word do double service, as. lco(hol)iday. den's er. i. An apparatus for reducing a gas D a liqmd, or a liquid to a solid. 2. Abba's* on denser. 3. An apparatus for the accumulaion of electricity, such as the Leyden jar or any f its modifications. 'dom [Conton, the inventor, said to have been London physician of the eighteenth century.] glove of rubber, gold-beater's skin, or similar L iibstance for the penis, for use in the prevention f infection or of conception during coitus. duc'tance. Conductivity. duc'tion [L. conducere, to lead, conduct.] i. "he act of transmitting or conveying certain Drms of motion, such as heat, sound, or electricity rom one point to another, without evident novement in the conducting body. 2. The ransmi ion of stimuli of various sorts by living i roto plasm,. air c, the normal pa age of sound raves through the external auditory meatus..v'alanche c, the discharge of an impulse from a leurone into a large number of neurones of the ame physiological system, thus producing the tberation of a very large amount of nervous nergy by a given stimulus, bone c, the pa age sound waves through the bones of the head, to if he internal ear. osteotym'panal u., bone c. iductiv'ity [L. conducere, to lead, conduct.] The power of transmi ion or conveyance of:. lertain forms of motion, as heat, sound, and ilectricity, without perceptible motion in the londucting body. 2. The property, inherent n living protoplasm, of transmitting stimuli. iduc'tor. I. A probe or sound with a groove hrough which a knife is pa ed in slitting open sinus or fistula; a grooved director. 2. Any I ubstance po e ing conductivity, idu'plicate [L. con-, with, -(- duplicare, to double.] 'olded upon itself lengthwise. iduran'go (N.F.). ^ The bark of Go no lobus coniurango, Marsdenia condurango, a shrub of Jcuador and Peru; alterative and at one time reputed specific for cancer, especially cancer I the stomach, in doses ot gr. 15-60 (1.0-4.0), )f )r 5 1 {4,0) of the N.F. fluidextract. [Henry Bollmann Candy, English I'dy's flu'id A jhysician, nineteenth century.] disinfectant;omposed of pota ium permanganate, gr. 15 |i.o), in water, 5 16 (500.0). i'dylar. Relating to a condyle. + i"dylarthro's is [G. kondylos, condyle, arthrosis jointing.] A joint, like that of the knee, formed I 3y condylar surfaces. A rounded idyle (kon'dil) [G. kondylos, knuckle.] ixticular surface at the extremity of a long bone, see condylus and epicondylus. idylec'to my [G. kondylos, condyle, -)- ektome. ixcision.] The cutting away of a condyle. idylion (kon-dil'I-on) [dim. of G. kondylos, coniyle.] A point on the outer (lateral) or inner [medial) surface of the condyle of the mandible.