20-letter words containing s, t, r, a, p, y
- photophosphorylation — phosphorylation that utilizes light as a source of energy, as in the formation of ATP from ADP and phosphorus during photosynthesis.
- physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
- planetary precession — the small component of the precession of the equinoxes contributed by the motion of the ecliptic, the change in orientation of the plane of the earth's orbit being produced by the gravitational attraction of the planets.
- play pass-the-parcel — to try to avoid a responsibility, or blame, by passing it on to someone else
- polyanthus narcissus — a Eurasian amaryllidaceous plant, Narcissus tazetta, having clusters of small yellow or white fragrant flowers
- post-synchronization — the recording of dialogue and sound effects in synchronization with the picture after the film has been shot.
- postal delivery zone — zone (def 10).
- preservation society — a society dedicated to the preservation of something, especially a building, environment, or animal
- presidential primary — a direct primary for the selection of state delegates to a national party convention and the expression of preference for a U.S. presidential nominee.
- primary spermatocyte — a male germ cell (primary spermatocyte) that gives rise by meiosis to a pair of haploid cells (secondary spermatocytes) that give rise in turn to spermatids.
- property speculation — the buying or selling of property in the hope of deriving capital gains
- prosecuting attorney — the public officer in a county, district, or other jurisdiction charged with carrying on the prosecution in criminal proceedings.
- pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
- psychiatric hospital — institution treating mental disorders
- pyrenees-atlantiques — a department in SW France. 2978 sq. mi. (7710 sq. km). Capital: Pau.
- pythagoras's theorem — (mathematics) The theorem of geometry, named after Pythagoras, of Samos, Ionia, stating that, for a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. I.e. if the longest side has length A and the other sides have lengths B and C (in any units), A^2 = B^2 + C^2 (2004-02-12)
- rapid transit system — a rail or other system providing rapid public transport
- respiratory quotient — the ratio of the amount of carbon dioxide released by the lungs to the amount of oxygen taken in during a given period.
- rocky mountain sheep — bighorn.
- royal leamington spa — a city in Warwickshire, central England: health resort.
- schizoid personality — sb with identity disorder
- spanish oyster plant — a composite plant, Scolymus hispanicus, of southern Europe, having spiny, thistlelike leaf margins, small yellow flowers, and an edible root.
- spectroscopic binary — a binary star having components that are not sufficiently separated to be resolved by a telescope, known to be a binary only bythe variations in wavelength of emitted light that are detected by a spectroscope.
- spontaneous recovery — the reappearance of a response after its extinction has been followed by a period of rest
- state highway patrol — a state's road traffic police
- strawberry-raspberry — an arching, prickly, Japanese plant, Rubus illecebrosus, of the rose family, having an herbaceous stem, white, fragrant flowers, and large, edible, scarlet fruit.
- subscription library — a commercial lending library
- supplementary angles — either of two angles that added together produce an angle of 180°.
- the (great) pyramids — the three large pyramids at Gîza, Egypt: the largest is the Pyramid of Khufu
- third-party software — software created by programmers or publishers independent of the manufacturer of the hardware for which it is intended.
- to spread your wings — If you spread your wings, you do something new and rather difficult or move to a new place, because you feel more confident in your abilities than you used to and you want to gain wider experience.
- turn an honest penny — to earn money fairly and honestly
- upper yosemite falls — a section of Yosemite Falls in central California, in the Yosemite National Park that is 436 m (1430 ft) high
- winter olympic games — an international contest of winter sports, esp skiing, held every four years