163 



GLOSSARY. 



Sin'ical (Lat. sinus, a sine). Be- 

 longing to a sine. 



Sinis'tral (Lat. sinis'ter, left). 

 Having spiral turns towards the left. 



Sinis'trorse (Lat. sinis'ter, left ; 

 versus, towards). Turned towards 

 the left. 



Sin'uate (Lat. sinus, a bay or inden- 

 tation). Having large curved 

 breaks in the margin. 



Sinuos'ity (Lat. sinus, an indenta- 

 tion). A winding in and out. 



Sin'uous (Lat. sinus, an indentation). 

 Winding ; crooked ; having a wavy 

 or flexuous margin. 



Sinus (Lat. a bay or indentation). 

 In anatomy, a cavity in a bone, 

 widest at the bottom ; a dilated 

 form of vein, mostly found in the 

 head ; in surgery, an elongated 

 cavity containing pus. 



Si'phon (Gr. O-I^CDV, siphon, a reed). 

 A bent tube with legs of unequal 

 length, used for drawing liquid 

 from a vessel. 



Siphon Barometer. A barometer in 

 which the lower end of the tube is 

 bent upwards in the form of a 

 siphon. 



Siphon Gauge. A glass siphon partly 

 filled with mercury, used for indi- 

 cating the degree of rarefaction, 

 which has been produced in the 

 receiver of an air-pump. 



Sipho'nal (Gr. fftQwv, siphon, a si- 

 phon or reed). Of the nature of a 

 siphon. 



Siphuncle (Gr. a-ujxav, siphon, a reed ; 

 cle, denoting smallness). A small 

 siphon. 



Siphonibran'chiate (Gr. o-Kpw, 

 si'phon, a tube ; Ppayx ia > bran'chia, 

 gills). Having a siphon or tube, 

 by which water is carried to the 

 gills. 



Siphonos'tomous (Gr. ffiQcai', siphon, 

 a reed ; OTo/ua, stoma, a mouth). 

 Having a mouth in the shape of a 

 siphon or tube. 



Siren. In acoustics, an instrument 

 for determining the number of vi- 

 brations produced by musical sounds 

 of different pitch. 



Siroc'co (Italian). An oppressive re- 

 laxing wind coming from North 



Africa over the Mediterranean to 

 Sicily, Italy, &c. 



Skel'eton (Gr. (TKS\\W, sM'lo, I dry). 

 The bones of an animal, dried, and 

 retained in their natural positions. 



Slate. In geology, properly applied 

 to argillaceous or clayey rocks, the 

 lamination or arrangement in plates 

 of which is not due to stratification 

 but to cleavage. 



Snow-line. The elevation at which 

 mountains are covered with per- 

 petual snow. 



Soap (Lat. sapo). In chemistry, a 

 compound of a fatty substance or 

 an oil-acid with a base. 



Soapstone. A soft variety of magne- 

 sian rock having a soapy feel. 



Sob'oles (Lat. a shoot or young branch). 

 A creeping underground stem. 



Solana'ceous (Lat. sola'num, the 

 nightshade). Belonging to the 

 order of plants which includes the 

 nightshade and potato. 



Solar (Lat. sol, the sun). Belonging 

 to the sun ; measured by the pro- 

 gress of the sun. 



Solar System. In astronomy, the 

 sun, with the assemblage of globes 

 or primary planets revolving round 

 it, and secondary planets or satel- 

 lites revolving round the primary. 



Sorecism. Impropriety in language, 

 consisting in the use of words or 

 expressions which do not agree with 

 the existing rules of grammatical 



, construction. 



Solen- (Gr. o-wXyv, siilen, a channel or 

 canal). A prefix in some compound 

 words, implying the presence of a 

 canal or pipe. 



Sol'id (Lat. sol'idus). Having the 

 component parts so firmly adherent 

 that the figure is maintained unless 

 submitted to more or less violent 

 external action. 



Solidun'gulous (Lat. sol'idus, solid ; 

 un'gula, a hoof). Having the hoof 

 entire or not cloven. 



Sol'iped (Lat. solus, alone ; pes, a foot). 

 Having only one apparent toe and 

 a single hoof to each foot, as the 

 horse. 



Sol'stices (Lat. sol, the sun ; sto, I 

 stand) . In astronomy, the periods 



