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PM, phase modulation | modulation of the phase of the carrier wave | ||
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promethium, Pm, atomic number 61 | a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium | ||
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postmeridian, pm | after midday | ||
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autopsy, necropsy, PM, postmortem, post-mortem, postmortem examination, post-mortem examination | an examination and dissection of a dead body to determine cause of death or the changes produced by disease | ||
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Prime Minister, PM, premier | the person who holds the position of head of the government in the United Kingdom |