| MM | <embryology, paediatrics> A congenital defect that is characterised by the protrusion of the membranes and cord through a defect in the vertebral column. (27 Sep 1997) |
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| mm virus | A strain of encephalomyocarditis virus, a species of cardiovirus, causing neurological disease in the mouse. (12 Dec 1998) |
| mmbtu | One million British thermal units. (05 Dec 1998) |
| mmHg | Abbreviation for millimetres of mercury to measure the partial pressure of a gas. (27 Sep 1997) |
| MMK4 kinase | <enzyme> A 44 kD mitogen-activated kinase from alfalfa, activated in response to mechanical stimulation Registry number: EC 2.7.10.- Synonym: p44(mmk4) kinase (26 Jun 1999) |
| MMMT | <abbreviation> Malignant mixed mullerian tumour or malignant mixed mesodermal tumour. (05 Mar 2000) |
| mmol | <abbreviation> Millimole. (05 Mar 2000) |
| mmpi | A personality inventory consisting of statements to be asserted or denied by the individual. The patterns of response are characteristic of certain personality attributes. (12 Dec 1998) |
| MMR | Measles, mumps, rubella vaccine. (12 Dec 1998) |
| MMR vaccine | <drug> The mumps, measles and rubella vaccine is recommended in all infants. Typically given twice, 15 months and at 4-6 years. (27 Sep 1997) |