12-letter words containing p, o, i, r
- silver point — the melting point of silver, equal to 960.8°C, used as a fixed point on the international temperature scale.
- silver spoon — spoon (def 16).
- simple group — a group that has no normal subgroup except the group itself and the identity.
- sinanthropus — the genus to which Peking man was formerly assigned.
- siphonophore — any pelagic hydrozoan of the order Siphonophora, being a floating or swimming colony composed of polyps.
- skeuomorphic — an ornament or design on an object copied from a form of the object when made from another material or by other techniques, as an imitation metal rivet mark found on handles of prehistoric pottery.
- slip through — be undetected
- slipper foot — an elongated pad foot.
- slipper sock — a sock with a soft leather or vinyl sole sewn onto it, used as indoor footwear.
- sloop-rigged — (of a sailboat) fore-and-aft rigged with a mainsail and a jib.
- soccer pitch — the field of play used in soccer
- sociographic — the branch of sociology that uses statistical data to describe social phenomena.
- soil profile — a vertical succession of horizons, commonly lettered A, B, C (beginning at the surface), that have been subjected to soil-forming processes, chiefly leaching and oxidation.
- somatotropin — a hormone secreted by the anterior pituitary gland, that stimulates growth in humans.
- somers point — a town in SE New Jersey.
- sophomorical — characteristic of a sophomore
- soporiferous — bringing sleep; soporific.
- sparcstation — (computer) A family of workstations from Sun Microsystems based on the SPARC architecture. Models include the SPARCStation 1, 1+, SLC, SPARCStation ELC, IPX, SPARCStation 5, SPARCStation 10 and SPARCStation 20.
- spatiography — the study of the characteristics of space beyond the atmosphere, including the mapping of the movements of celestial bodies and the recording of electrical, magnetic, and gravitational effects, especially those likely to affect missiles and spacecraft.
- special sort — a character, such as an accented letter, that is not a usual member of any font
- specksioneer — a whaler
- spectatorial — a person who looks on or watches; onlooker; observer.
- spermagonium — Botany, Mycology. spermogonium.
- spermatocide — spermicide.
- spermatozoid — a motile male gamete produced in an antheridium.
- spermogonium — one of the cup-shaped or flask-shaped receptacles in which the spermatia of certain fungi and red algae are produced.
- spermophytic — able to produce seed
- spin control — Slang. an attempt to give a bias to news coverage, especially of a political candidate or event.
- spinning rod — a flexible fishing rod, often made of fiberglass, used with a spinning reel.
- spinsterhood — Disparaging and Offensive. a woman still unmarried beyond the usual age of marrying.
- spiral-bound — having a spiral binding.
- spirochaetal — resulting from spirochaetes
- spit-roasted — cooked on a spit
- spoil ground — an area within a body of water, especially in the sea, where dredged material is deposited.
- sponsorships — a person who vouches or is responsible for a person or thing.
- sporadically — (of similar things or occurrences) appearing or happening at irregular intervals in time; occasional: sporadic renewals of enthusiasm.
- sporangiolum — a small sporangium
- sporogenesis — the production of spores; sporogony.
- sportability — suitability to be used in or as a sport
- sportfishing — fishing with a rod and reel for sport, especially for saltwater sport fish from a motorboat.
- sporting dog — one of any of several breeds of usually large dogs especially suited by size and training for hunting by pointing, flushing, and retrieving game and including the pointers, setters, retrievers, and spaniels.
- sporting gun — a gun intended for hunting
- sports drink — a drink containing sugar and salts, etc designed to help replace fluid and energy lost through the physical exertion of sport
- sports shirt — a long- or short-sleeved soft shirt for informal wear by men, having a squared-off shirttail that may be left outside the trousers, usually worn without a tie.
- sportswriter — a journalist who reports on sports and sporting events.
- spring onion — scallion
- square piano — a piano with a rectangular, horizontal body.
- sr flip-flop — (hardware) (Or "RS flip-flop") A "set/reset" flip-flop in which activating the "S" input will switch it to one stable state and activating the "R" input will switch it to the other state. The outputs of a basic SR flip-flop change whenever its R or S inputs change appropriately. A clocked SR flip-flop has an extra clock input which enables or disables the other two inputs. When they are disabled the outputs remain constant. If we connect two clocked SR flip-flops so that the Q and /Q outputs of the first, "master" flip-flop drive the S and R inputs of the second, "slave" flip-flop, and we drive the slave's clock input with an inverted version of the master's clock, then we have an edge-triggered RS flip-flop. The external R and S inputs of this device are latched on one edge (transition) of the clock (e.g. the falling edge) and the outputs will only change on the next opposite (rising) edge. If both R and S inputs are active (when enabled), a race condition occurs and the outputs will be in an indeterminate state. A JK flip-flop avoids this possibility.
- stabilograph — an instrument for measuring body sway.
- state prison — a prison maintained by a state for the confinement of felons.