| TAD | Acronym for transient acantholytic dermatosis. (05 Mar 2000) |
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| tadpole | 1. <zoology> The young aquatic larva of any amphibian. In this stage it breathes by means of external or internal gills, is at first destitute of legs, and has a finlike tail. Called also polliwig, polliwog, porwiggle, or purwiggy. 2. <zoology> The hooded merganser. Tadpole fish. <zoology> See Forkbeard . Origin: OE. Tadde toad (AS. Tadie, tadige) + poll; properly, a toad that is or seems all head. See Toad, and Poll. Source: Websters Dictionary (01 Mar 1998) |
| tadpole-shaped pupil | An intermittent, brief distortion and dilation of a pupil that draws one part of the iris into a peak so that the pupil resembles a tadpole; a temporary, benign condition associated with migraine that may leave the patient with a Horner's syndrome. (05 Mar 2000) |