Macroeconomics: branch of economics that studies how the economy operates as a whole, covering such topics as total output, employment and price levels; cf. microeconomics. makroekonomia

Macroparasites: parasites that do not multiply within their definitive hosts but instead produce transmission stages (eggs and larvae) which pass into the external environment.; cf. microparasites. makropasożyty

Macroscopic organisms: organisms big enough to be seen by the eye without the aid of a microscope. organizmy makroskopowe

Magnetic resonance imaging (MRI): method of imaging body tissues that uses the response or resonance of the nuclei of the atoms of one of the bodily elements, typically hydrogen or phosphorus, to externally applied magnetic fields. obrazowanie rezonansem magnetycznym, rezonans magnetyczny

Magnitude estimation: technique from psychophysics wherein judges are asked to rate the magnitude of the sensation produced by one stimulus versus another as a ratio (e.g. 2.5 times as much). ocena/szacowanie wielkości

Major depressive disorder: psychological disorder characterised by depressed mood or loss of interest in most daily activities, plus at least five major symptoms during a two-week period. Major symptoms include: significant weight gain or loss; insomnia or hypersomnia; psychomotor agitation or retardation; fatigue or loss of energy; feelings of guilt or worthlessness; indecisiveness or impaired ability to concentrate; and recurrent thoughts of death or suicide. ciężkie zaburzenie depresyjne

Major medical expense insurance: policy designed to help offset the heavy medical expenses resulting from catastrophic or prolonged illness or injury; generally provide benefits payments for 75 to 80 percent of most types of medical expenses above a deductible paid by the insured.