| MTDT | modified tone decay test |
|---|---|
| NTD | neural tube defect; nitroblue tetrazolium dye; noise tone difference; 5'-nucleotidase |
| PTAT | pure tone average threshold |
| ST | esotropia; scala tympani; scaphotrapezoid; sclerotherapy; sedimentation time; semitendinosus; sensor... |
| TD | tabes dorsalis; tardive dyskinesia; T-cell dependent; temporary disability; terminal device; tetanus... |
| pitcairn island | An island in polynesia, in the south pacific ocean. It was discovered in 1767 by philip carteret, uninhabited until 1790 when settled by mutineers from the english ship, bounty. The settlement was discovered in 1808; the population was removed temporarily to tahiti in 1831 and to norfolk island (between new caledonia and new zealand) in 1856. Some later returned to pitcairn and their descendents constitute the present population of this british colony. The island is named for the midshipman who first sighted it from the ship. (12 Dec 1998) |
|---|---|
| CpG island | <molecular biology> Region of genomic DNA rich in the dinucleotide C G. Methylation of the C in the dinucleotide is maintained through cell divisions and profoundly affects the degree of transcription of the nearby genes and is important in developmental regulation of gene expression. (18 Nov 1997) |
| cpg-rich island | <molecular biology> Areas of DNA which consist mostly of the base pair sequence CGCGCGCG. (alternating cytosine and guanine nucleotide bases) that are usually found upstream of many genes and are thought to help regulate gene expression. They are often methylated (have methyl groups attached to the DNA segments). (28 May 1998) |
| prince edward island | An island in the gulf of st. Lawrence constituting a province of canada in the eastern part of the country. It is very irregular in shape with many deep inlets. Its capital is charlottetown. Discovered by the french in 1534 and originally named ile saint-jean, it was renamed in 1799 in honor of prince edward, fourth son of george III and future father of queen victoria. (12 Dec 1998) |
| island | 1. <geography> A tract of land surrounded by water, and smaller than a continent. Cf. Continent. 2. Anything regarded as resembling an island; as, an island of ice. Origin: OE. Iland, yland, AS. Igland, gland, glond; ig, g, island + land, lond, land. AS. Ig, g, is akin to AS. Ea water, river, OHG. Uwa, G. Au meadow, Icel. Ey island, Dan. & Sw. O, Goth. Ahwa a stream, water, L. Aqua water. The s is due to confusion with isle. Cf. Ait, Eyot, Ewer, Aquatic. Source: Websters Dictionary (01 Mar 1998) |
| island disease | See Typhus, scrub. (12 Dec 1998) |
| island fever | See Typhus, scrub. (12 Dec 1998) |
| island flap | A flap in which the pedicle consists solely of the supplying artery and vein(s), sometimes including a nerve. (05 Mar 2000) |
| island of Reil | 1. An oval region of the cerebral cortex overlying the extreme capsule, lateral to the lenticular nucleus, buried in the depth of the fissura lateralis cerebri (sylvian fissure). Synonym: insular area, insular cortex, island of Reil. Synonym: island. 3. Any circumscribed body or patch on the skin. Origin: L. Island (05 Mar 2000) |
| threshold of island of Reil | The band of transition between the anterior portion of the gray matter of the insula and the anterior perforated substance; it is formed by a narrow strip of olfactory cortex along the lateral side of the lateral olfactory stria. Synonym: threshold of island of Reil. (05 Mar 2000) |