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- PURINEAny of a class of organic heterocyclic compounds, composed of fused pyrimidine and imidazole rings, that constitute one of the two groups of organic nitrogenous bases (the other be
- PUSTULAROf, pertaining to, or containing pustules.
- PUSTULEA small accumulation of pus in the epidermis or dermis.
- PYKE
- PYODERMAAn infection of the skin by pyogenic bacteria.
- PYRESplural of pyre
- PYREXA kind of heat-resistant borosilicate glass, made by mixing a high concentration of boron oxides into the molten glass to reduce its thermal expansion coefficient.
- PYRIDIUM
- PYTHAGORAS
- PYURIAThe presence of pus in the urine.
- QUADRATICSquare-shaped.
- QUALIAplural of quale
- QUAM
- QUIDThe inherent nature of something.
- QUIDSplural of quid (rare for UK pound currency usage)
- QUINTILESplural of quintile
- QUOGUE
- QUORUMA select body of (usually eminent) justices of the peace, every member of which had to be present to constitute a deciding body; a member of this body. Later more generally: all ju
- QUOTERSomeone who quotes.
- RADIIplural of radius
- RADIUMThe chemical element (symbol Ra) with an atomic number of 88. It is a soft, shiny and silvery radioactive alkaline earth metal. An atom of this element.
- RADONThe chemical element (symbol Rn, formerly Ro) with atomic number 86. It is an odorless, colorless, chemically inert but radioactive noble gas. An atom of this element.
- RALEAn abnormal clicking, rattling or crackling sound, made by one or both lungs and heard with a stethoscope, caused by the popping open of airways collapsed by fluid or exudate, or s
- RAPTUS
- RATANSplural of ratan
- RAYONA manufactured regenerated cellulosic fiber.
- REBUTTo drive back or beat back; to repulse.
- REINA
- REIT
- RHEUMATICResembling or relating to rheumatism.
- RICEDMade into or consisting of finely minced pieces resembling rice
- RICEYContaining rice.
- RICYAlternative form of ricey.
- RIFTEDThis term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.
- RIMEDCovered in rime (etymology 1) or frost.
- RIMESplural of rime
- RITZYElegant and luxurious.
- RIVULETA small stream; a streamlet; a gill.
- ROTESplural of rote
- ROTIA kind of unleavened flatbread commonly consumed in South Asia and the Caribbean.
- ROUSEY
- ROUTEDsimple past and past participle of route
- ROWE
- RUBIA
- RUBICONA limit that when surpassed cannot be returned from, or an action that when taken cannot be reversed.
- RUSEA turning or doubling back, especially of animals to get out of the way of hunting dogs.
- SABOTEURA person who intentionally causes the destruction of property in order to hinder the efforts of their enemy.
- SALIC
- SALIENTWorthy of note; pertinent or relevant.
- SALVEAn ointment, cream, or balm with soothing, healing, or calming effects.
- SAWYEROne who saws timber, especially in a sawpit.
- SAXONY
- SCADAny of several fish, of the family Carangidae, from the western Atlantic.
- SCALIA
- SCHIZOPODAny of the Schizopoda.
- SCID
- SCIF
- SCIONA descendant, especially a first-generation descendant of a distinguished family.
- SCURVYAffected or covered with scurf (“skin disease causing flakes of skin to fall off”) or scabs; scurfy, scabby; also, of or relating to a skin disease causing scurf or to scurvy (noun
- SCYTHEAn instrument for mowing grass, grain, etc. by hand, composed of a long, curving blade with a sharp concave edge, fastened to a long handle called a snath.
- SDEROT
- SEETH
- SEMANTICOf or relating to semantics or the meanings of words.
- SEMAPHOREAny equipment used for visual signalling by means of flags, lights, or mechanically moving arms, which are used to represent letters of the alphabet, or words.
- SEPTALOf or pertaining to a septum.
- SEPTICEMIAA disease caused by the presence of pathogenic organisms, especially bacteria, or their toxins, in the bloodstream, characterized by chills and fever.
- SERFA partially free peasant of a low hereditary class, attached like a slave to the land owned by a feudal lord and required to perform labour, enjoying minimal legal or customary rig
- SERIFA short line added to the end of a stroke in traditional typefaces, such as Times New Roman.
- SEWARD
- SHALEDsimple past and past participle of shale
- SHERPAA local mountain guide or porter, particularly a male of the Nepalese Sherpa people so employed.
- SHIGA
- SHILEY
- SHIMA wedge.
- SHIVAA weeklong period of formal mourning for a close relative.
- SHOALShallow.
- SHOFARA ram’s-horn trumpet, used for Jewish ritual purposes.
- SHOREDHaving a shore, often one of a specified type.
- SHUTEAlternative form of chute.
- SIALICOf or pertaining to saliva.
- SICA
- SIDEL
- SIDEROPHILEIn the Goldschmidt classification, an element that forms alloys easily with iron and is concentrated in the Earth's core.
- SIDON
- SIEVERTIn the International System of Units, the derived unit of radiation dose: the dose received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 0.5 mm thic
- SIGINT
- SIGNETAn object (especially a ring) formerly used to impress a picture into the sealing wax of a document as a proof of its origin.
- SILANEAny of a group of silicon hydrides that are analogous to alkanes (the paraffin hydrocarbons); especially the parent compound SiH4.
- SILICASilicon dioxide.
- SILICO
- SINGETo burn slightly.
- SINTERAn alluvial sediment deposited by a mineral spring.
- SIOP
- SITARA Hindustani/Indian classical stringed instrument, typically having a gourd as its resonating chamber.
- SKEEN
- SKEETA form of trapshooting using clay targets to simulate birds in flight.
- SKEINA quantity of thread, yarn, etc., wound on a reel then removed and loosely knotted into an oblong shape; a skein of cotton is formed by eighty turns of thread around a reel with a
- SLAGWaste material from a mine.
- SLEYReed (of a loom).
- SLOPA loose outer garment; a jacket or overall.