| steradian | (noun) the unit of solid angle adopted under the Systeme International d'Unites | Synonyms: sr |
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| stercobilinogen | (noun) a chromogen formed in the intestine from the breakdown of bilirubin; yields urobilins on oxidation; some is excreted in the feces and some is resorbed and excreted in bile or urine | Synonyms: urobilinogen |
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| stercolith | (noun) a hard mass of fecal matter | Synonyms: coprolith, faecalith, fecalith |
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| sterculia | (noun) any tree of the genus Sterculia | - |
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| stereo | (noun) reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound | Synonyms: stereo system, stereophonic system, stereophony |
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| (noun) two photographs taken from slightly different angles that appear three-dimensional when viewed together | Synonyms: stereoscopic photograph, stereoscopic picture |
| stereochromy | (noun) a process of mural painting in which the pigment is fixed by a series of reactions between the lime, fluosilicic acid, and water glass. | - |
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| stereoisomer | (noun) any of a group of isomers in which atoms are linked in the same order but differ in their spatial arrangement. | - |
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| stereophony | (noun) reproducer in which two microphones feed two or more loudspeakers to give a three-dimensional effect to the sound | Synonyms: stereo, stereo system, stereophonic system |
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| stereophotography | (noun) photography producing images that appear to have depth and solidness and that are created by using a special device (called a stereoscope) to look at two slightly different photographs of something at the same time. | Synonyms: stereo photography, stereoscopic photography |
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| stereoscope | (noun) an optical device for viewing stereoscopic photographs | - |
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| stereoscopy | (noun) three-dimensional vision produced by the fusion of two slightly different views of a scene on each retina | Synonyms: stereoscopic vision |
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| stereotype | (noun) a conventional or formulaic conception or image | - |
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| sterileness | (noun) (of non-living objects) the state of being free of pathogenic organisms | Synonyms: antisepsis, asepsis, sterility |
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| sterilisation | (noun) the act of making an organism barren or infertile (unable to reproduce) | Synonyms: sterilization |
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| (noun) the procedure of making some object free of live bacteria or other microorganisms (usually by heat or chemical means) | Synonyms: sterilization |
| steriliser | (noun) a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments | Synonyms: autoclave, sterilizer |
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| sterility | (noun) the state of being unable to produce offspring; in a woman it is an inability to conceive; in a man it is an inability to impregnate | Synonyms: infertility |
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| (noun) (of non-living objects) the state of being free of pathogenic organisms | Synonyms: antisepsis, asepsis, sterileness |
| sterilization | (noun) the act of making an organism barren or infertile (unable to reproduce) | Synonyms: sterilisation |
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| (noun) the procedure of making some object free of live bacteria or other microorganisms (usually by heat or chemical means) | Synonyms: sterilisation |
| sterilizer | (noun) a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments | Synonyms: autoclave, steriliser |
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| sterling | (noun) British money; especially the pound sterling as the basic monetary unit of the UK | - |
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| stern | (noun) the rear part of a ship | Synonyms: after part, poop, quarter, tail |
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| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, tail, tail end, tooshie, tush |
| sternness | (noun) uncompromising resolution | Synonyms: strictness |
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| (noun) the quality (as of scenery) being grim and gloomy and forbidding | - |
| sternocleidomastoid | (noun) one of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head | Synonyms: musculus sternocleidomastoideus, sternocleido mastoideus, sternocleidomastoid muscle |
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| sternpost | (noun) (nautical) the principal upright timber at the stern of a vessel | - |
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| sternum | (noun) the flat bone that articulates with the clavicles and the first seven pairs of ribs | Synonyms: breastbone |
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| sternutation | (noun) a symptom consisting of the involuntary expulsion of air from the nose | Synonyms: sneeze, sneezing |
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| sternutator | (noun) a chemical substance that causes sneezing and coughing and crying | Synonyms: sternutatory |
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| sternutatory | (noun) a chemical substance that causes sneezing and coughing and crying | Synonyms: sternutator |
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| sternwheeler | (noun) a paddle steamer having the paddle wheel in the stern | - |
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| steroid | (noun) any of several fat-soluble organic compounds having as a basis 17 carbon atoms in four rings; many have important physiological effects | - |
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| (noun) any hormone affecting the development and growth of sex organs | Synonyms: sex hormone, steroid hormone |
| sterol | (noun) any of a group of natural steroid alcohols derived from plants or animals; they are waxy insoluble substances | Synonyms: steroid alcohol |
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| stertor | (noun) the act of snoring or producing a snoring sound | Synonyms: snore, snoring |
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