p.m.
n. an examination and dissection of a dead body to determine cause of death or the changes produced by disease 同义词：autopsynecropsypostmortempost-mortemPMpostmortem examinationpost-mortem examination
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 同义词：promethiumPmatomic number 61
the person who holds the position of head of the government in England 同义词：Prime MinisterPMpremier
modulation of the phase of the carrier wave 同义词：phase modulationPM
adj.after noon 同义词：post meridiempm
adv.between noon and midnight 同义词：post meridiemPM