136 



A GLOSSARY OF TERMS 



margin, produced by alternations 

 of projecting lobes and indenta- 

 tions. (Jig. 32, p. 37. Book vii). 



SINUA'TO-DKNTATE. Sinuate and 



toothed. 



S T N'UOUS. Relating or belonging to 

 a sinus. Partaking of the nature 

 of a sinus. 



SINUO'SITY. A hollow ; an irregu- 

 lar, winding excavation or hollow. 



SI'NUS. Lat. A bay, or recess. A 

 groove or cavity. In anatomy, 

 any cavity, the interior of which 

 is more expanded than the en- 

 trance; in this respect, being the 

 reverse of fossa. Venous sinus is 

 a venous canal into which a num- 

 ber of vessels empty 



SI'PHON fr. gr. siphon, a lube. A 

 sucker. A cylindrical canalj per- 

 forating the partitions of multilo- 

 cular shells. A hydraulic instru- 

 ment used for emptying liquids 

 from one vessel into another, with- 

 out disturbing the mass of the 

 liquid. 



SIPHONA'RIA. fr. gr. siphon, a tube. 

 An order of cephalopods. 



SIPHONO'STOMOUS. fr. gr. siphon, a 

 tube; sloma, a mouth. Applied 

 to animals which have a tube- 

 like or suctorial mouth. 



SIPKU'NCLE. A small siphon. A 

 cylindrical canal perforating the 

 partitions in polythalamous shells. 



SIPHU'NCULUS. Lat. A siphuncle. 



SIPC'NCULUS. fr. lat. sipo, siponis, a 

 tube. A siponcle. A genus of 

 radiate animals which dwell in 

 mud and sand near the sea. One 

 species of this mud-worm is eaten 

 by the Chinese. 



SIREN, or STRKN. fr. gr. seira, a 

 chain, from the supposed strength 

 of its charms. A fabulous mon- 

 ster. Name of a kind of batra- 

 chian. 



SITTA. fr. gr. sitto, I cry. Generic 

 name of the nuthatches. 



SKELETON. fr. gr. skdlo, I dry. The 

 aggregate of the hard parts of the 

 body, or the bones. 



SKIN. The dense, elastic mem- 

 brane, which envelopes the body. 

 It consists of three layers or lami- 

 nae; the derma, the epidermis, and 

 rete mucosum, the last being situate 

 between the other two. The co- 

 lour of the different races of men 

 depends upon the colour of this 

 rete mucosum (mucous net) ; the 

 other two layers being alike or 

 nearly so, in the whole human 

 family. 



SLAG. The glassy compounds pro- 

 duced during the reduction of 

 metallic ores, by means of mixes. 



SLATE. A well known rock, which 

 is divisible into thin plates or 

 layers. 



SMARA'GD fr. gr. smaragdos, green. 

 A name for the emerald. 



SMELTING. The reduction of me- 

 tallic ores, for the purpose of ex- 

 tricating the pure metal. 



SNOW-LIKE. That limit of elevation 

 in every latitude at which the air 

 attains the temperature of freez- 

 ing water. 



SO'BOLKS. A kind of stem ; a slen- 

 der stem of certain plants, which 

 creeps horizontally below the sur- 

 face of the earth, emitting roots 

 and new plants at intervals. 



SOBOLI'FEROUS. Producing young 

 plants from the root. 



SODDENED. Soaked. 



SOIL. The external thin layer of 

 earth in which plants grow, com 

 posed of fragments of minerals, 

 vegetables and animals, reduced 

 to a great degree of tenuity. 



SO'IAU fr. lat. sol, the sun. Be- 

 longing or relating to ihe sun. 



SOLA'NE;E. From Solanum. Name 

 of a family of plants. 



SOLA'NUM. Lat. Nightshade. 



SOLA'RIUM. Lat. A sun-dial. A 

 genus of the family of trochoides. 

 (p. 46, Book v). 



SOLK/A. Lat. A sole. 



SOLEMT'A. A genus of mollusks of 

 the family of inclusa. (p. 86. 

 Book v). 



