| 释义 | 
		Noun: PMS- A syndrome that occurs in many women from 2 to 14 days before the onset of menstruation
  - premenstrual syndrome, PMT [Brit]  Noun: PM- Modulation of the phase of the carrier wave
  - phase modulation  - The person who holds the position of head of the government in the United Kingdom
  - Prime Minister, premier  - An examination and dissection of a dead body to determine cause of death or the changes produced by disease
  - autopsy, necropsy, postmortem, post-mortem, postmortem examination, post-mortem examination  Noun: Pm- 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
  - promethium, atomic number 61 
 Type of: chief of state, examination, head of state, metal, metallic element, modulation, scrutiny, syndrome Part of: British Cabinet Encyclopedia: PM  PMS Pm |