| Pythagorean theorem | Pythagoras | Python |
| Pythonidae | Pytheas | Pyrimidine |
| PyramidThis is about the polyhedron. For information on the pyramids of Egypt, see Egyptian pyramids. Geometric shape ''formed by connecting a polygonal base A pyramid is a geometric shape formed by connecting a polygonal base and a point called the apex, by tri | Python programming languagePython is an interpreted, interactive programming language created by Guido van Rossum in 1990, originally as a scripting language for Amoeba OS capable of making system calls. Python is often compared to Tcl, Perl, Scheme, Java and Ruby. Python is develo | PyridinePyridine is one of the simplest heterocyclic aromatic molecules, with the Hill system formula C H N. Pyridine is structurally similar to benzene, with a single nitrogen atom substituting in the six-member aromatic ring for one of the carbon and one of the |
| PyxisPyxis (the compass) is a minor southern constellation introduced by Nicolas Louis de Lacaille under the name Pyxis Nautica''. It is perhaps supposed to represent the compass of Argo Navis, though the Argo could hardly have had a compass, as the ancient Gr | Pythagorean tripleA Pythagorean triple consists of three positive integers a b c such that a''2 + b''2 c''2. The name comes from the Pythagorean theorem, which states that any right triangle with integer side lengths yields a Pythagorean triple. The converse is also true: | Pyotr Ilyich TchaikovskyPyotr Ilyich Tchaikovsky ( Russian ́ ́ sometimes transliterated as Piotr Anglicised as Peter Ilich , ( May 7, 1840 November 6, 1893 ( N. April 25, 1840 October 25, 1893 ( O. was a Russian composer of the Romantic era. Although not a member of t |
| PyreneesFor other meanings see: Pyrenees, Victoria and Montes Pyrenaeus. The Pyrenees ( Spanish Pirineos French Pyrenees Catalan Pirineus Basque Aunamendi are a range of mountains in southwest Europe that form a natural border between France and Spain. They separ | Pythagorean tuningPythagorean tuning is a system of musical tuning in which the frequency relationships of all intervals are based on the ratio 3:2. Its discovery is generally credited to Pythagoras. It is the oldest way of tuning the 12-note chromatic scale and, as such, | PyriteThe mineral pyrite or iron pyrite is iron disulfide, FeS. It has isometric crystals that usually appear as cubes or pyritohedrons. It has a slightly uneven and conchoidal fracture, a hardness of 6-6. 5, and a specific gravity of 4. Its metallic luster and |
| Pylos | Pyongyang | Pyramid scheme |
| Pygmy Hippopotamus | Pygmalion | Pyrrolysine |
| Pyramidal orchid | Pyramus and Thisbe | Pyrrha |
| Pythian Games | Pylades | Pyrometer |
| Pyruvic acid | Pyrrhus | Python (mythology) |
| Pythias | Pygmalion of Tyre | Pyrénées-Atlantiques |
| Pygmy mythology | Pyrophosphate | Pyatt, Arkansas |
| Pyroxene | Pyramid of Djoser | Pymatuning Central, Pennsylvania |
| Pymatuning North, Pennsylvania | Pymatuning South, Pennsylvania | Pymatuning Township, Pennsylvania |
| Pyrénées-Orientales | Pyote, Texas | Pyrrho |
| Pyrochlore | Pyrros Dimas | Pyroelectricity |
| Pyrokinesis | Pyruvate | Pyrgi Tablets |
| Pythagorean comma | Pyrrole | Pyrrhic |
| Pythagoreans | Pyrrhic victory | Pyrrhus of Epirus |
| Pyroclastic flow | Pyrrhocorax | Pyhäjärvi |
| Pyrenean Mountain Dog | Pygmy parrot | Pyromania (album) |
| Pyromania | Pyrolysis | Pyromancy |
| Pyrethrum | Pyrenean | Pyrénée |
| Pygmy | Pythagoreanism | PY |
| Pyro (comics) | Pyotr Leonidovich Kapitsa | Pyroto |
| Pyrgos | Pythagorean expectation | Pyrex |
| Pygmy Right Whale | Pygopodidae | Pyrgos (disambiguation) |
| Pyramids (Discworld) | Pygopus | Pykrete |
| Pygomeles | Pyroclastic | Pyotr Klimuk |
| Pyonghwa Motors | Pyrzyce | Pybba of Mercia |
| Pyramid Lake | Pyramid (game show) | PYY 3-36 |
| PySol | Pysanka | Pyskowice |
| Pyeongchang County | Pyrotechnic | Pyroclastic rock |
| Pyrenoid | Pygmy Killer Whale | Pyroclastic surge |
| Pyandj | Pyracantha | Pyramid Technology |
| Pygmy Sperm Whale | Pyotr Ivanovich Kafarov | Pyrenees Shire |
| PyUnit | Pyruvate kinase | Pyruvate translocase |
| Pyramidal number | Pyruvate dehydrogenase | Pyrenean Shepherd |
| Pyongan | Pyridinium | Pyloric valve |
| Pygmalion effect | Pygmy music | Pymble, New South Wales |