| lens, simple | <microscopy> A glass disk ground and polished with a spherical figure on one side and a plano, concave, or convex configuration on the other side. (05 Aug 1998) |
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| adder's-tongue | <botany> A genus of ferns (Ophioglossum), whose seeds are produced on a spike resembling a serpent's tongue. The yellow dogtooth violet. Source: Websters Dictionary (01 Mar 1998) |
| anti-black-tongue factor | A precursor of NAD, that is a product of the oxidation of nicotine. (18 Nov 1997) |
| baked tongue | The dry blackish tongue noted when patients with typhoid fever or other disorders are allowed to become dehydrated. (05 Mar 2000) |
| bald tongue | An erythematous, edematous, and painful tongue which appears smooth due to loss of the filiform and sometimes the fungiform papillae secondary to certain nutritional deficiencies, especially B-vitamin deficencies, as seen in pellagra, thiamin deficiency, and disorders such as pernicious anaemia (Hunter's or Moeller's glossitis). Synonym: bald tongue. (05 Mar 2000) |
| base of tongue | The posterior attached portion of the tongue. Synonym: radix linguae, base of tongue. (05 Mar 2000) |
| beet-tongue | Sometimes used of the tongue in pellagra, where intense erythema appears, first at the tip, then along the edges, and finally over the dorsum; there may be pain and increased elevation; the shiny appearance results from oedema, not atrophy, except in chronic pellagra. (05 Mar 2000) |
| bifid tongue | A structural defect of the tongue in which the extremity is divided longitudinally for a greater or lesser distance. See: diglossia. Synonym: cleft tongue. (05 Mar 2000) |
| bird's-tongue | <botany> The knotgrass (Polygonum aviculare). Source: Websters Dictionary (01 Mar 1998) |
| black tongue | In canines, a disorder associated with a deficency of nicotinic acid. Black to yellowish brown discoloration of the dorsum of the tongue due to staining by exogenous material such as the components of tobacco; usually superimposed on hairy tongue. Synonym: lingua nigra, melanoglossia, nigrities linguae. (05 Mar 2000) |
| black-tongue disease | A disease of dogs similar to human pellagra and due to niacin deficiency. (05 Mar 2000) |
| blind foramen of the tongue | <anatomy> A median pit on the dorsum of the posterior part of the tongue, from which the limbs of a V-shaped furrow run forward and outward; it is the site of origin of the thyroid gland and subsequent thyroglossal duct in the embryo. Synonym: foramen caecum linguae, blind foramen of the tongue, caecal foramen of the tongue, Morgagni's foramen, pleuroperitoneal foramen. (05 Mar 2000) |
| body of tongue | The oral part of the tongue anterior to the terminal sulcus. Synonym: corpus linguae. (05 Mar 2000) |
| caecal foramen of the tongue | <anatomy> A median pit on the dorsum of the posterior part of the tongue, from which the limbs of a V-shaped furrow run forward and outward; it is the site of origin of the thyroid gland and subsequent thyroglossal duct in the embryo. Synonym: foramen caecum linguae, blind foramen of the tongue, caecal foramen of the tongue, Morgagni's foramen, pleuroperitoneal foramen. (05 Mar 2000) |
| magenta tongue | Purplish red colouration of the tongue, with oedema and flattening of the filiform papillae, occurring in riboflavin deficiency. Compare: cyanosis. (05 Mar 2000) |