| meconidine | <chemistry> An alkaloid found in opium, and extracted as a yellow amorphous substance which is easily decomposed. Source: Websters Dictionary (01 Mar 1998) |
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| meconidium | <zoology> A kind of gonophore produced by hydroids of the genus Gonothyraea. It has tentacles, and otherwise resembles a free medusa, but remains attached by a pedicel. Origin: NL, dim. Of Gr. A poppy. So called in allusion to the shape of the seed capsules of the poppy. Source: Websters Dictionary (01 Mar 1998) |
| meconin | <chemistry> A substance regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance. Also erroneously called meconina, meconia, etc, as though it were an alkaloid. Origin: Cf. F. Meconine. Source: Websters Dictionary (01 Mar 1998) |
| meconinic | <chemistry> Pertaining to, or designating, an acid which occurs in opium, and which may be obtained by oxidizing narcotine. Source: Websters Dictionary (01 Mar 1998) |
| meconiorrhoea | Passage, by the newborn infant, of an abnormally large amount of meconium. Origin: meconium + G. Rhoia, flow (05 Mar 2000) |
| meconism | Rarely used term for opium addiction or poisoning. Origin: G. Mekon, poppy (05 Mar 2000) |
| meconium | <paediatrics> The first stools of the newborn. Typically thick, viscous, sticky and dark green. Usually sterile and odourless. (27 Sep 1997) |
| meconium aspiration | Syndrome caused by sucking of thick meconium into the lungs, usually by term or post-term infants (often small for gestational age) either in utero or with first breath. The resultant small airway obstruction may produce respiratory distress, tachypnea, cyanosis, pneumothorax, and/or pneumomediastinum. (12 Dec 1998) |
| meconium aspiration syndrome | <radiology> Intra-uterine foetal distress most likely to be defecation of meconium, term and post-term neonates, not preemies, not kids of diabetic moms, diffuse HYPERaeration, pulmonary interstitial emphysema (PIE), pnuemomediastinum and non-tension ptx in 33%, patchy atelectasis and consolidation, lung disease usually resolves spontaneously, morbidity due to intrauterine cerebral anoxia (12 Dec 1998) |
| meconium blockage syndrome | <syndrome> Low intestinal obstruction in newborn infants resulting from blockage of meconium. (05 Mar 2000) |
| meconium ileus | <radiology> Obstructed bowel due to impacted, tenacious meconium, no air-fluid levels (probably due to adherent bowel contents) Differential diagnosis: ileal atresia, Hirschsprung disease, anal atresia associated with cystic fibrosis (12 Dec 1998) |
| meconium peritonitis | Peritonitis caused by intestinal perforation in the foetus or newborn; associated with congenital obstruction or fibrocystic disease of the pancreas. (05 Mar 2000) |
| meconium plug | <radiology> Functional colonic inertia, Diagnosis/Treatment: Gastrografin enema (Differential diagnosis: Hirschsprung disease, meconium ileus), F/U with another enema for confirmation, associated with maternal diabetes (12 Dec 1998) |