| MG | Marcus Gunn [pupil]; margin; medial gastrocnemius [muscle]; membranous glomerulonephritis; menopausa... |
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| MS | Maffuci syndrome; maladjustment score; mandibular series; Marfan syndrome; Marie-Strumpell [syndrome... |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |
| EPB | Extensor Pollisis Brevis |
| ECRB | extensor carpi radialis brevis |
| great superior pancreatic artery | <anatomy, artery> Origin, splenic; distribution, head and body of pancreas; anastomoses, superior pancreaticoduodenal. Synonym: arteria pancreatica dorsalis, great superior pancreatic artery. (05 Mar 2000) |
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| great vein of Galen | A large, unpaired vein formed by the junction of the two internal cerebral veins in the caudal part of the tela choroidea of the third ventricle; it passes caudally between the splenium of the corpus callosum and the pineal gland, curving dorsally to merge with the inferior sagittal sinus to form the straight sinus. Synonym: vena cerebri magna, great cerebral vein, great vein of Galen. (05 Mar 2000) |
| great vessels | <radiology> 5 vessels above aortic arch R BCV L BCV right and left brachiocephalic VEINS L CCA left common carotid artery R BCA L SCA right brachiocephalic artery left subclavian artery (12 Dec 1998) |
| cistern of great cerebral vein | <anatomy, vein> An expansion of the subarachnoid space extending forward between the corpus callosum and the thalamus; it encloses the internal cerebral veins which caudally join to form the vena magna cerebri (Galen's vein). Synonym: ambient cistern, Bichat's canal, Bichat's foramen, cistern of great vein of cerebrum, cisterna ambiens, cisterna superioris, cisterna venae magnae cerebri, superior cistern. (05 Mar 2000) |
| cistern of great vein of cerebrum | <anatomy, vein> An expansion of the subarachnoid space extending forward between the corpus callosum and the thalamus; it encloses the internal cerebral veins which caudally join to form the vena magna cerebri (Galen's vein). Synonym: ambient cistern, Bichat's canal, Bichat's foramen, cistern of great vein of cerebrum, cisterna ambiens, cisterna superioris, cisterna venae magnae cerebri, superior cistern. (05 Mar 2000) |
| plague, great | The Great Plague that swept London in 1665 was probably not really the plague but rather typhus. (12 Dec 1998) |
| corrected transposition of the great vessels | Anatomically or physiologically corrected malposition of the great arteries. In anatomically corrected transposition, they arise from the correct ventricles but have an abnormal relation to each other (actually a malposition rather than a transposition.) In physiologically or functionally corrected transposition, the aorta arises from a systemic ventricle that has the morphologic characteristics of a right ventricle, and the pulmonary artery arises from a "venous" ventricle that has the morphologic characteristics of a left ventricle. (05 Mar 2000) |
| posterior branch of great auricular nerve | <anatomy, nerve> Provides general sensory fibres to skin of posterior auricle and over mastoid process. Synonym: ramus posterior nervi auricularis magni. (05 Mar 2000) |
| transposition of great vessels | <embryology> A congenital cardiovascular malformation in which the aorta arises entirely from the right ventricle and the pulmonary artery from the left ventricle, so that the venous return from the peripheral circulation is recirculated by the right ventricle via the aorta to the systemic circulation without being oxygenated in the lungs. There is an intracardiac shunt, increased pulmonary vascularity, cyanosis. The chest X-ray shows that the heart size may be normal at birth, but it gradually enlarges with a globular or egg-on-its-side appearance. (27 Jun 1999) |
| transposition of the great vessels | Congenital malformation in which the aorta arises from the morphologic right ventricle and the pulmonary artery from the morphologic left ventricle resulting in two separate and parallel circulations. The condition is lethal unless some communication exists between the systemic and pulmonic circulation after birth; otherwise, unoxygenated venous blood inappropriately enters the systemic circulation, and oxygenated pulmonary venous blood is inappropriately directed to the pulmonary circulation. The life sustaining communication may be an intra-atrial passage or a patent ductus arteriosus. Synonym: transposition of arterial stems. (05 Mar 2000) |
| red-short | <chemistry> Hot-short; brittle when red-hot; said of certain kinds of iron. Red"-shortness. Source: Websters Dictionary (01 Mar 1998) |
| congenitally short oesophagus | <radiology> Very rare findings: nonreducible intrathoracic gastric segment, short straight oesophagus, circular narrowing at GE junction frequently with ulcer, GE reflux see also: hiatal hernia (12 Dec 1998) |
| hot-short | <chemistry> More or less brittle when heated; as, hot-short iron. Source: Websters Dictionary (01 Mar 1998) |
| short | 1. Not long; having brief length or linear extension; as, a short distance; a short piece of timber; a short flight. "The bed is shorter than that a man can stretch himself on it." (Isa. Xxviii. 20) 2. Not extended in time; having very limited duration; not protracted; as, short breath. "The life so short, the craft so long to learn." (Chaucer) "To short absense I could yield." (Milton) 3. Limited in quantity; inadequate; insufficient; scanty; as, a short supply of provisions, or of water. 4. Insufficiently provided; inadequately supplied; scantily furnished; lacking; not coming up to a resonable, or the ordinary, standard; usually with of; as, to be short of money. "We shall be short in our provision." (Shak) 5. Deficient; defective; imperfect; not coming up, as to a measure or standard; as, an account which is short of the trith. 6. Not distant in time; near at hand. "Marinell was sore offended That his departure thence should be so short." (Spenser) "He commanded those who were appointed to attend him to be ready by a short day." (Clarendon) 7. Limited in intellectual power or grasp; not comprehensive; narrow; not tenacious, as memory. "Their own short understandings reach No farther than the present." (Rowe) 8. Less important, efficaceous, or powerful; not equal or equivalent; less (than); with of. "Hardly anything short of an invasion could rouse them again to war." (Landor) 9. Abrupt; brief; pointed; petulant; as, he gave a short answer to the question. 10. Breaking or crumbling readily in the mouth; crisp; as, short pastry. 11. <chemistry> Brittle. Metals that are brittle when hot are called ot-short; as, cast iron may be hot-short, owing to the presence of sulphur. Those that are brittle when cold are called cold-short; as, cast iron may be cold-short, on account of the presence of phosphorus. 12. Engaging or engaged to deliver what is not possessed; as, short contracts; to be short of stock. See The shorts, under Short, and To sell short. In mercantile transactions, a note or bill is sometimes made payable at short sight, that is, in a little time after being presented to the payer. 13. Not prolonged, or relatively less prolonged, in utterance; opposed to long, and applied to vowels or to syllables. In English, the long and short of the same letter are not, in most cases, the long and short of the same sound; thus, the i in ill is the short sound, not of i in isle, but of ee in eel, and the e in pet is the short sound of a in pate, etc. See Quantity, and Guide to Pronunciation, 22. Short is much used with participles to form numerous self-explaining compounds; as, short-armed, short-billed, short-fingered, short-haired, short-necked, short-sleeved, short-tailed, short-winged, short-wooled, etc. at short notice, in a brief time; promptly. Short rib, any suit having only three cards, or less than three. To come short, To cut short, To fall short, etc. See Come, Cut, etc. Origin: OE. Short, schort, AS. Scort, sceort; akin to OHG. Scurz, Icel. Skorta to be short of, to lack, and perhaps to E. Shear, v. T. Cf. Shirt. Source: Websters Dictionary (01 Mar 1998) |
| short bone | One whose dimensions are approximately equal; it consists of a layer of cortical substance enclosing spongy substance and narrow. Compare: long bone. Synonym: os breve. (05 Mar 2000) |