pyaemia |paɪˈiːmiːə| — septicemia caused by pus-forming bacteria being released from an abscess

pycnometer  — (physics) a vessel used to determine the specific gravity of a liquid; a specific gravity bottle

pye-dog |ˈpaɪ dɔːɡ| — ownerless half-wild mongrel dog common around Asian villages especially India

pyemia  — septicemia caused by pus-forming bacteria being released from an abscess

pygmy |ˈpɪɡmɪ| — an unusually small individual

pyjamas |pəˈdʒæməz| — (chiefly British) Standard form of pajamas (clothes for sleeping in).

pyknic |ˈpɪknɪk| — having a squat and fleshy build

pylon |ˈpaɪlən| — a tower for guiding pilots or marking the turning point in a race

pylorus |paɪˈlɔːrəs| — a small circular opening between the stomach and the duodenum

pyorrhea  — discharge of pus

pyorrhoea |ˌpaɪəˈrɪə| — discharge of pus

pyramid |ˈpɪrəmɪd| — a polyhedron having a polygonal base and triangular sides with a common vertex

pyramidal |ˈpɪrəmɪdl| — resembling a pyramid

pyre |ˈpaɪər| — wood heaped for burning a dead body as a funeral rite

pyretic |paɪˈretɪk| — causing fever

pyrexia |paɪˈreksɪə| — a rise in the temperature of the body; frequently a symptom of infection

pyrite |ˈpaɪraɪt| — a common mineral (iron disulfide) that has a pale yellow color

pyrites |pəˈraɪtiːz| — any of various metallic-looking sulfides (of which pyrite is the commonest)

pyroelectricity  — generation of an electric charge on certain crystals (such as tourmaline) as a result of a change in temperature

pyrometer |paɪˈrɑːmɪtər| — a thermometer designed to measure high temperatures

pyrophoric |ˌpaɪrə(ʊ)ˈfɒrɪk| — spontaneously igniting in air, especially when in a finely divided state

pyrosis |paɪˈrəʊsɪs| — a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder

pyrotechnic |ˌpaɪrəˈteknɪk| — (usually plural) a device with an explosive that burns at a low rate and with colored flames; can be used to illuminate areas or send signals etc.

pyrotechnics |ˌpaɪrəˈteknɪks| — (music) brilliance of display (as in the performance of music)

pyrotechnist |ˌpaɪrəʊˈteknɪst| — (dated) A pyrotechnician: person skilled in the manufacture or setting off of fireworks and firework displays.

pyrotechny |ˈpaɪrətekniː| — the craft of making fireworks

pyroxene |paɪˈrɑːksɪn| — any of a group of crystalline silicate mineral common in igneous and metamorphic rocks

pyroxylin |paɪˈrɑːksəlɪn| — highly flammable nitrocellulose used in making collodion and plastics and lacquers

pyroxyline  — highly flammable nitrocellulose used in making collodion and plastics and lacquers

Pyrrhic |ˈpɪrɪk| — a metrical unit with unstressed-unstressed syllables

pyrrhonist  — A follower of Pyrrho; a skeptic.

pyrrol |pɪˈrəʊl| — (dated) Alternative spelling of pyrrole.

pyrrole |ˈpɪrəʊl| — (organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of four carbon atoms and a nitrogen atom; especially the simplest one, C4H5N.

Pythagorean |paɪˌθæɡʌˈriːən| — of or relating to Pythagoras or his geometry

python |ˈpaɪθɑːn| — large Old World boas

pythoness |ˈpaɪθənɪs| — a witch with powers of divination

pythonic  — Of or pertaining to the pythons

pyx |pɪks| — a chest in which coins from the mint are held to await assay

pyxis |ˈpɪksɪs| — fruit of such plants as the plantain; a capsule whose upper part falls off when the seeds are released