pyorrhoea (also esp US pyorrhea)

n [U] diseased condition of the gums that causes them to shrink and the teeth to become loose 齿槽脓溢.

putsch, putt, puttee, putter, putting-green, putty, puzzle, puzzled, puzzlement, puzzler, puzzling, PVC, Pvt, PW, PX, pygmy (also pigmy), pyjama (US pajama), pyjamas, pyjamas (also esp US pajamas), pylon, pyramid, pyramid selling, pyramidal, pyre, Pyrex, pyrites, pyromania, pyromaniac, pyrotechnic, pyrotechnics, Pyrrhic victory, python, Q, Q, q, QB, QC, QE2, QED, qr, qt,