| Quincke's sign | The capillary pulse as appreciated in the finger and toenails during aortic regurgitation; ebb and flow is seen. Synonym: Quincke's sign. (05 Mar 2000) |
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| inferior triangle sign | In chest radiology, lateral displacement of the diaphragmatic pleura near the diaphragm, associated with collapse of the upper lobe, usually on the right side. (05 Mar 2000) |
| objective sign | <clinical sign> A sign that is evident to the examiner. (05 Mar 2000) |
| optic sign | <microscopy> For uniaxial materials, by definition, the sign is positive if the value epsilon minus omega is positive, and negative if epsilon - omega is negative. For biaxial materials, the sign is positive if gamma is the acute bisectrix, and negative if alpha is the acute bisectrix, or positive if gamma - beta greater than beta - alpha and negative if gamma - beta less than beta - alpha (05 Aug 1998) |
| Osler's sign | <clinical sign> In acute bacterial endocarditis, circumscribed painful erythematous swellings, ranging in size from that of a pinhead to that of a pea, in the skin and subcutaneous tissues of the hands and feet. (05 Mar 2000) |
| ten Horn's sign | <clinical sign> Pain caused by gentle traction on the right spermatic cord, indicative of appendicitis. (05 Mar 2000) |
| terry thomas sign | <radiology> A gap between the scaphoid and the lunate bones suggesting a rupture of the scapho-lunate ligament (12 Dec 1998) |
| Thomson's sign | <clinical sign> The presence of pink or red transverse lines at the bend of the elbow in the preeruptive stage of scarlatina; they persist through the eruptive stage and remain as pigmented lines after desquamation. Synonym: Thomson's sign. (05 Mar 2000) |
| Ebstein's sign | <clinical sign> In pericardial effusion, obtuseness of the cardiohepatic angle on percussion. Sign of oedema of lower eyelid, swelling of the lower lid found in congestive failure, myxoedema, or nephrosis. (05 Mar 2000) |
| tinel's sign | <clinical sign> A physical exam finding indicating carpal tunnel syndrome. Electric shock-like pains are appreciated when the examiner taps lightly on the underside of the wrist, over the median nerve. (27 Sep 1997) |
| Toma's sign | <clinical sign> To distinguish between inflammatory and noninflammatory ascites: in inflammatory conditions of the peritoneum, the mesentery contracts, drawing the intestines over to the right side; consequently, when the patient lies on his back, tympany is elicited on the right side, dullness on the left. (05 Mar 2000) |
| Topolanski's sign | <clinical sign> Congestion of the pericorneal region of the eye in Graves' disease. (05 Mar 2000) |
| Tournay sign | Dilation of the pupil in the abducting eye on extreme lateral gaze. This is present in only a small percentage of the normal popupation and has no known association with disease. Synonym: Tournay sign. (05 Mar 2000) |
| Traube's sign | <clinical sign> A double sound or murmur heard in auscultation over arteries (particularly the femoral arteries) in significant aortic regurgitation. (05 Mar 2000) |
| Trelat's sign | <clinical sign> An obsolete sign; the presence of disseminated yellowish spots in the neighborhood of tuberculous ulcers of the mouth; they are minute tubercles or miliary abscesses. (05 Mar 2000) |