| S Doradus ... sabotage |
| Sabratha ... safe-conduct |
| safety ... Saint Abb's Head |
| Saint Albans ... Saint Joseph River |
| Saint Joseph's University ... Saint-Dizier |
| Saint-Etienne ... Sakaide |
| Sakakah ... Salford |
| Salgado, Sebastiao ... salt |
| salt ... Samarkand rug |
| Samarkand ware ... San Antonio Zoological Gardens and Aquarium |
| San Antonio, Cape ... San Justo |
| San Kuan ... Sancho II |
| Sancho II ... Sandwich |
| sandwich board ... Sant'Antioco Island |
| Sant'Elia, Antonio ... Santiago |
| Santiago de Cuba ... Saptamatrka |
| Sapulpa ... Sarit Thanarat |
| Sariwon ... satin |
| satin glass ... Savage, Richard |
| Savai'i ... Sayers, Gale |
| Sayers, Tom ... scenario |
| Scenedesmus ... Schirra, Walter M., Jr. |
| schism ... Schonerer, Georg, Knight von |
| Schongauer, Martin ... Schwassmann-Wachmann 1, Comet |
| Schwechat ... scorpionfly |
| Scorpius ... Scrophulariaceae |
| Scrophulariales ... Seagram Company Ltd. |
| seal ... Seddon, Richard John |
| seder ... Sehore |
| Sei Shonagon ... Selkirk, Alexander |
| Selkirk, Thomas Douglas, 5th Earl of, Lord Daer And Shortcleuch ... Senegambia |
| senescence ... Serbs, Croats, and Slovenes, Kingdom of |
| Seremban ... servomechanism |
| sesame ... Severomoravsky |
| Severus Alexander ... Sha'rani, ash- |
| Sha-ch'ing ... Shamal Sina' |
| shamanism ... Sharqiyah, Ash- |
| Sharqiyah, Ash- ... sheet moss |
| sheet-web weaver ... Sheraton, Thomas |
| sherbet ... Shilluk |
| Shiloh ... Shishakli, Adib ash- |
| Shishkov, Aleksandr Semyonovich ... Shoshone-Bannock |
| Shostakovich, Dmitry ... Shyok River |
| Si Suriyawong, Somdet Chao Phraya ... Siebert, Muriel |
| Siebold, Carl Theodor Ernst von ... sijo |
| sika ... Silone, Ignazio |
| Silphium ... Simon, Neil |
| Simon, Paul ... singlestick |
| Singleton ... Sisley, Alfred |
| Sismondi, J.-C.-L. Simonde de ... Skate |
| skate ... Slade, Jack |
| slag ... Sloan, Alfred P., Jr. |
| Sloan, John French ... Smith, Bernard |
| Smith, Bessie ... Smoot-Hawley Tariff Act |
| smooth hound ... snowman porcelain |
| snowmobile ... Socialist Revolutionary Party |
| socialization ... Sokch'o |
| Sokhumi ... Solo River |
| Sologne ... Son Pyong-hi |
| Son River ... Sorensen, Villy |
| Sorge, Richard ... Sousa, Martim Afonso de |
| Sousa, Tome de ... South Staffordshire |
| South Tyneside ... sowon |
| soybean ... spearfishing |
| Spearman, Charles E. ... Sperrgebiet |
| Sperrin Mountains ... spire |
| spirea ... sprain |
| Spranger, Bartholomaeus ... squirrel corn |
| squirrel monkey ... Staines |
| stainless steel ... Star of India |
| Star of South Africa ... stearyl alcohol |
| steatite ... Stenness |
| Steno's law ... Stessel, Anatoly Mikhaylovich |
| stethoscope ... Stillman, James |
| Stillwater ... Stokesay |
| Stokowski, Leopold ... Stotz, Carl E. |
| Stoughton ... Stratton, Charles |
| Stratton, Dorothy Constance ... stromatolite |
| Stromboli Island ... Sturmer, Boris Vladimirovich |
| Sturnidae ... sucking louse |
| suckling ... Sui Dynasty |
| suiboku-ga ... Sully, Maximilien de Bethune, Duke de |
| Sully, Thomas ... Sunbury |
| Sunbury ... supply and demand |
| supply curve ... suslik |
| Suslov, Mikhail Andreyevich ... Svevo, Italo |
| Svinhufvud, Pehr Evind ... sweetbrier |
| sweetener ... Syktyvkar |
| Sylacauga ... Syracuse |
| Syracuse University ... |
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