| terminal addition enzyme | <enzyme> A non-template-directed DNA polymerase normally found in vertebrate thymus and bone marrow. It catalyses the elongation of oligo- or polydeoxynucleotide chains and is widely used as a tool in the differential diagnosis of acute leukaemias in man. Chemical name: Nucleoside-triphosphate:DNA deoxynucleotidylexotransferase Registry number: EC 2.7.7.31 (12 Dec 1998) |
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| terminal artery | <anatomy, artery> An artery with insufficient anastomoses to maintain viability of the tissue supplied if occlusion of the artery occurs. Synonym: terminal artery. (05 Mar 2000) |
| terminal bar | Obsolete name for zonula occludens (tight junction). (18 Nov 1997) |
| terminal boutons | The somewhat enlarged, often club-shaped endings by which axons make synaptic contacts with other nerve cells or with effector cells (muscle or gland cells). As isolated, by homogenizing brain or spinal cord, they contain acetylcholine and the related enzymes. Terminals contain neurotransmitters of various kinds, sometimes more than one. These can be demonstrated by chemical analysis and immunocytochemical methods. See: synapse. Synonym: axonal terminal boutons, end-feet, neuropodia, pieds terminaux, synaptic boutons, synaptic endings, synaptic terminals, terminal boutons, bouton terminaux. (05 Mar 2000) |
| terminal bronchiole | The end of the nonrespiratory conducting airway; the lining is simple columnar or cuboidal epithelium without mucous goblet cells; most of the cells are ciliated, but a few nonciliated serous secreting cells occur. Synonym: bronchiolus terminalis. (05 Mar 2000) |
| terminal care | Medical and nursing care of patients in the terminal stage of an illness. (12 Dec 1998) |
| terminal cisternae | Regions of the sarcoplasmic reticulum adjacent to T tubules and from which calcium is released when striated muscle is activated. (18 Nov 1997) |
| terminal crest | A vertical crest on the interior wall of the right atrium that lies to the right of the sinus of the vena cava and separates this from the remainder of the right atrium. Synonym: tenia terminalis, terminal crest. (05 Mar 2000) |
| terminal deletion | Deletion involving the terminal part of a chromosome and leading to a adhesive terminus. (05 Mar 2000) |
| terminal deoxynucleotidyltransferase | <enzyme> A non-template-directed DNA polymerase normally found in vertebrate thymus and bone marrow. It catalyses the elongation of oligo- or polydeoxynucleotide chains and is widely used as a tool in the differential diagnosis of acute leukaemias in man. Chemical name: Nucleoside-triphosphate:DNA deoxynucleotidylexotransferase Registry number: EC 2.7.7.31 (12 Dec 1998) |
| terminal disinfection | Application of disinfective measures after the patient has been removed, e.g., by death, or has ceased to be a source of infection. (05 Mar 2000) |
| terminal endocarditis | Verrucous endocardial lesions occurring in the terminal stages of many chronic infectious and wasting diseases. Synonym: abacterial thrombotic endocarditis, cachectic endocarditis, terminal endocarditis, thromboendocarditis. (05 Mar 2000) |
| terminal filum | 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 ganglion | One of the cells located along the terminal nerves, one of the scattered postganglionic autonomic neurons located in or close to the wall of the organ innervated; they are usually parasympathetic. Synonym: ganglion terminale. (05 Mar 2000) |
| terminal haematuria | The presence of blood only in the last fraction of voided urine, usually indicating a prostatic source of bleeding. (05 Mar 2000) |