PYOPNEUMOTHORAX
Py`op*neu`mo*tho"rax, n. Etym: [Gr. pneumothorax.] (Med.)
Defn: Accumulation of air, or other gas, and of pus, in the pleural cavity.
PYOT
Py"ot, n. (Zoöl.)
Defn: The magpie. See Piet.
PYOXANTHOSE
Py`o*xan"those, n. Etym: [Gr. (Physiol. (Chem.)
Defn: A greenish yellow crystalline coloring matter found with pyocyanin in pus.
PYRACANTH
Pyr"a*canth, n. Etym: [Gr. (Bot.)
Defn: The evergreen thorn (Cratægus Pyracantha), a shrub native of
Europe.
PYRAL
Py"ral, a.
Defn: Of or pertaining to a pyre. [R.]