190 



GLOSSARY. 



the waters of springs holding lime 

 in solution. 



Trem'atode (Gr. rp^a, tre'ma, a 

 pore). An order of parasitic 

 animals having suctorial pores. 



Trepa'n (Gr. rpvirai/ov, tru'panon, a 

 wimble). A circular saw for re- 

 moving a portion of the skull. 



Trephi'ne (Gr. rpeiru, trep'u, I turn). 

 A surgical instrument used for the 

 same purpose as the trepan, of 

 which it is a modification. 



Tri-(Lat. tres, or Gr. rpeis, treis, three). 

 A prefix in compound words, signi- 

 fying three. 



Triadel'phous (Gr. rpeis, treis, three ; 

 o5eA(J>os, adel'phos, a brother). Hav- 

 ing, the stamens united in three 

 bundles. 



Trian'dria (Gr. rptis, treis, three ; 

 ai'Tjp, aner, a male). A class of 

 plants in the Linnasan system 

 having three stamens. 



Trian'gle (Lat. tres, three; an'gidus, 

 an angle). A plane figure, having 

 three sides and three angles. 



Trian'gular (Triangle). Having the 

 form of a triangle; relating to a 

 triangle ; applied to a series of 

 numbers, such as 1, 3, 6, 10, 15, 

 21, &c., because the number of 

 points expressed by any one may be 

 arranged in an equilateral triangle; 

 in botany, having three angles, the 

 faces being flat. 



Trias'sic (Gr. rptas, trios, a triad). 

 In geology, a name given to the 

 upper new red sandstone, from its 

 consisting of three divisions in 

 Germany, whence the term was in- 

 troduced. 



Triba'sic (Gr. rpeis, treis, three; 

 fiao-is, ba'sis, a base). In chemis- 

 try, applied to a class of salts which 

 contain three atoms of base to one 

 of acid. 



Tribe (Lat. tri'bus). A division or 

 class of people, sometimes origina- 

 ting from one forefather ; a num- 

 ber of animals or vegetables having 

 certain characters in common. 



Tri'bracn. (Gr. rpeis, treis, three ; 

 fipaxvs, brach'us, short). A foot 

 in verse, consisting of three short 

 syllables. 



Tricap'sular (Lat. tres, three; cap'- 

 sula, a little chest). Having three 

 capsules. 



Tri'ceps (Lat. tres, three; cap'ut, a 

 head). Having three heads ; ap- 

 plied to muscles which arise by 

 three heads. 



TricM'asis (Gr. 0pt|, thrix, hair). A 

 turning inwards of the eyelashes, so 

 that they irritate the ball of the 

 eye. 



Trichop'terous (Gr. 0pi|, thrix, hair ; 

 TTTfpov, pter'on, a wing). An order 

 of insects having hairy membranous 

 wings. 



Trichot'omous (Gr. rpixa, trich'a, 

 thrice ; re^va, temno, I cut). Di- 

 vided into three parts. 



Tri'chroism (Gr. rpeis, treis, three; 

 Xpoa, chroa, colour). An appear- 

 ance which some bodies present of 

 having three diiferent colours, ac- 

 cording to the way in which the 

 rays of light traverse them. 



Tricoc'cous (Gr. rpeis, treis, three; 

 KOKKO<;, kok'kos, a berry). Applied 

 to a fruit consisting of a capsule 

 with three cells, each containing 

 one seed. 



Tricos'tate (Lat. tres, three ; costa, a 

 rib). Three-ribbed. 



Tricus'pid (Lat. tres, three ; cus'pis, a 

 point). Having three points : ap- 

 plied to a valve situated between 

 the right auricle and ventricle ot 

 the heart. 



Tricus'pidate (Lat. tres, three ; cus'- 

 pis, a point). In botany, having 

 three long points. 



Tridac'tylous (Gr. rpeis, treis, three ; 

 $ctKTv\os, daTdtnlos, a finger, or 

 toe). Having three fingers or toes. 



Triden'tate (Lat. tres, three ; dens, a 

 tooth). Having three teeth. 



Trien'nial (Lat. tres, three ; an'nus, 

 a year). Containing three years ; 

 happening every three years. 



Trifa'cial (Lat. tres, three ; facfies, a 

 face). A term applied to one of 

 the cranial nerves, from its division 

 into three large branches, and dis- 

 tribution to the face and adjoining 

 parts. 



Trifa'rious (Lat. trifa'riam, in three 

 ways). In three rows. 



