| MN | a blood group in the MNSs blood group system; malignant nephrosclerosis; Master of Nursing; meganewt... |
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| NARP | neuropathy-ataxia-retinitis pigmentosa [syndrome] |
| NTE | neuropathy target esterase; neurotoxic esterase; not to exceed |
| OPIDN | organophosphorus-induced delayed neuropathy |
| PION | posterior ischemic optic neuropathy |
| toxic substances | A chemical or mixture of chemicals that presents a high risk of injury to human health or to the environment. (05 Dec 1998) |
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| toxic tetanus | Tonic spasms caused by strychnine or other tetanic. Synonym: toxic tetanus. (05 Mar 2000) |
| toxic unit | A unit formerly synonymous with minimal lethal dose but which, because of the instability of toxins, is now measured in terms of the quantity of standard antitoxin with which the toxin combines. See: L doses, minimal lethal dose. Synonym: toxin unit. (05 Mar 2000) |
| epidermal necrolysis, toxic | An exfoliative disease of skin seen primarily in adults and characterised by flaccid bullae and spreading erythema so that the skin has the appearance of being scalded. It results primarily from a toxic reaction to various drugs, but occasionally occurs as a result of infection, neoplastic conditions, or other exposure. (12 Dec 1998) |