| sound pressure level | A measure of sound energy relative to 0.0002 dynes/cm2, expressed in decibels. (05 Mar 2000) |
|---|---|
| sound spectrography | The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations. (12 Dec 1998) |
| subneural apparatus | Modified sarcoplasm in a motor end-plate. (05 Mar 2000) |
| succussion sound | The noise made by fluid with overlying air when shaken, such as occurs with gastric dilatation or with fluid and air in a pleural cavity (hydropneumothorax). (05 Mar 2000) |
| Davis interlocking sound | A sound comprised of two instruments with curved male and female tips, used to introduce a catheter into the bladder in the treatment of ruptured urethra; the male sound is introduced into the distal urethra via the meatus and the female sound is passed downward through the bladder neck into the proximal urethra via an open cystotomy; the ends of the two instruments are engaged, with the female sound guiding the male sound upward into the bladder; a catheter is then sutured to the tip of the male sound and withdrawn through the urethra to restore continuity of its lumen. (05 Mar 2000) |
| dental apparatus | The organs and structures primarily functioning in mastication: the jaws, teeth with their supporting structures, temporomandibular joint, muscles of mastication, tongue, lips, cheeks, and oral mucosa. Synonym: dental apparatus, masticatory apparatus. (05 Mar 2000) |
| digestive apparatus | The digestive tract from the mouth to the anus with all its associated glands and organs. Synonym: apparatus digestorius. (05 Mar 2000) |
| double-shock sound | Applied by J. B. Bouillaud to describe the cadence of a split-second heart sound, or of the second sound followed by an opening snap or early third heart sound. Synonym: double-shock sound. Origin: Fr. Drum-beat (05 Mar 2000) |
| intensity of sound | The objective measurement of the amplitude of vibration of a sound wave. (05 Mar 2000) |
| tambour sound | Reverberating, musical tone heard as the second heart sound over the aortic area, associated with syphilitic aortic valvular disease. Synonym: tambour sound. Origin: Fr. Sound of drum (05 Mar 2000) |
| Taylor's apparatus | taylor's back brace |
| third heart sound | Occurs in early diastole and corresponds with the end of the first phase of rapid ventricular filling; normal in children and younger people but abnormal in others. Synonym: third sound. (05 Mar 2000) |
| third sound | Occurs in early diastole and corresponds with the end of the first phase of rapid ventricular filling; normal in children and younger people but abnormal in others. Synonym: third sound. (05 Mar 2000) |
| Tiselius apparatus | An apparatus for separating proteins in solution by electrophoresis and thus for determining the isoelectric point, molecular weight, and related physical properties; the direction and rate of migration of the protein and the characteristics of the boundary phase between the protein solution and the supernatant salt solution are recorded by photography of the changes in refractive index at the boundary. (05 Mar 2000) |
| to-and-fro sound | Doubling of an abnormal murmur usually in systole and diastole and formerly applied to pericardial rubs. (05 Mar 2000) |