| ET | educational therapy; effective temperature; ejection time; embryo transfer; endothelin; endotoxin; e... |
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| Fd | the amino-terminal portion of the heavy chain of an immunoglobulin molecule; ferredoxin |
| FTIR | Fourier-transformed infrared; functional terminal innervation ratio |
| LRT | local radiation therapy; long terminal repeat; lower respiratory tract |
| LTR | location transactivating region; long terminal repeat |
| terminal stria | A slender, compact fibre bundle that connects the amygdala (amygdaloid body) with the hypothalamus and other basal forebrain regions. Originating from the amygdala, the bundle passes first caudalward in the roof of the temporal horn of the lateral ventricle; it follows the medial side of the caudate nucleus forward in the floor of the ventricle's central part (or body) until it reaches the interventricular foramen, in the posterior wall of which it curves steeply down to enter the hypothalamus, with fibres passing both rostral and caudal to the anterior commissure. Coursing caudalward in the medial part of the hypothalamus, the bundle terminates in the anterior and ventromedial hypothalamic nuclei. Synonym: stria terminalis, Foville's fasciculus, Tarin's tenia, tenia saemicircularis. (05 Mar 2000) |
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| terminal sulcus | Sulcus terminalis linguae; a V-shaped groove, with apex pointing backward, on the surface of the tongue, marking the separation between the oral, or horizontal, and the pharyngeal, or vertical, parts, sulcus terminalis atrii dextri; a groove on the surface of the right atrium of the heart, marking the junction of the primitive sinus venosus with the atrium. Synonym: terminal sulcus. (05 Mar 2000) |
| terminal thread | A long, slender connective tissue (pia mater) strand extending from the extremity of the medullary cone to the internal aspect of the spinal dural sac (filum terminale internum); stout strands of connective tissue attaching the spinal dural sac to the coccyx (filum terminale externum), commonly called the coccygeal ligament. Synonym: filum terminale, nervus impar, terminal thread. (05 Mar 2000) |
| terminal transferase | <enzyme> An enzyme adds a particular nucleotide to the 3' end of DNAstrands. (09 Oct 1997) |
| terminal transferases | Enzymes that covalently add nucleotides to the 3' end of polynucleic acids; e.g., DNA nucleotidylexotransferase. (05 Mar 2000) |
| terminal vein | <anatomy, vein> A long vein passing forward in the groove between the thalamus and caudate nucleus, covered by the lamina affixa, receiving the transverse caudate veins along its lateral side, and joining at the caudal wall of Monro's foramen with the choroidal vein and vein of septum pellucidum to form the internal cerebral vein. Synonym: vena terminalis, vena thalamostriata superior, terminal vein, vein of corpus striatum. (05 Mar 2000) |
| terminal ventricle | A dilation of the central canal of the spinal cord at the tip of the medullary cone. Synonym: ventriculus terminalis. (05 Mar 2000) |
| terminal web | <cell biology> The cytoplasmic region at the base of microvilli in intestinal epithelial cells, a region rich in microfilaments from the microvillar core and from adherens junctions, in myosin and in other proteins characteristic of an actomyosin motor system. (13 Jan 1998) |
| termino-terminal anastomosis | An operation by which the central end of an artery is connected with the peripheral end of the corresponding vein, and the peripheral end of the artery with the central end of the vein. (05 Mar 2000) |
| functional terminal innervation ratio | The number of muscle fibres divided by the number of axons that innervate them. (05 Mar 2000) |
| long-terminal repeat | <molecular biology> Identical DNA sequences, several hundred nucleotides long, found at either end of transposons and the proviral DNA, formed by reverse transcription of retroviral RNA. They are thought to have an essential role in integrating the transposon or provirus into the host DNA. Long terminal repeats have inverted repeats, that is, sequences close to either end are identical when read in opposite directions. In proviruses the upstream long-terminal repeat acts as a promoter and enhancer and the downstream long-terminal repeat as a polyadenylation site. Acronym: LTR (15 Nov 1997) |
| long terminal repeat sequences | Regions of the RNA genome associated with regulation, integration, and expression of retroviruses. (05 Mar 2000) |
| ala central lobule | The lateral winglike projection of the central lobule of the cerebellum. Synonym: ala lobuli centralis, ala cerebelli. (05 Mar 2000) |
| anterior central convolution | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |
| anterior central gyrus | Bounded posteriorly by the central sulcus and anteriorly by the precentral sulcus. Synonym: gyrus precentralis, anterior central convolution, anterior central gyrus, ascending frontal convolution, ascending frontal gyrus. (05 Mar 2000) |