TET 



413 



THE 



viscid juice, and the fruit yields 

 a solid, rank-smelling fat, used 

 for making candles. 



tetrapetalous, a., tZt'-ra-pZt'al-us 

 (Gr. tetra, four ; petdldn, a leaf), 

 in bot., containing four distinct 

 petals, flowers, or leaves. 



tetrapterous, a., tet-rdp'-tZr-us (Gr. 

 tetra,, four ; pte'rtin, a wing), 

 having four wings. 



tetraquetrous, a., t&frd'k&tfritt or 

 tU-rakf-trus (Gr. tetra, four ; L. 

 quadra, a square), in hot., having 

 four angles, the faces being con- 

 cave ; see ' tetragonous. ' 



tetraspore, n., tU'-ra-spor (Gr. 

 tetra,, four; spora, a seed), among 

 the Algae, reproductive bodies 

 composed of four spores or germs: 

 tetrasporous, a., tet'ra,'spdr / -tis, 

 bearing tetraspores. 



tetrathecal, a., ttt'-ra-thetfal (Gr. 

 tetra, four ; theke, a case), in 

 lot., having four loculaments or 

 thecse. 



tetter, n., tetter (Icel. titra, to 

 tremble ; Ger. zitter, a tetter), a 

 skin-disease, often appearing on 

 the face and side of the mouth ; 

 herpes. 



Thalamiflorse, n. plu., thdl'dm-l- 

 flor'-e (L. thalamus, a receptacle ; 

 flos, a flower, floris, of a flower), 

 in bot., a Sub-class of the class 

 of plants Dicotyledones or Exog- 

 ense: thalamifloral, a., thdl'-dm- 

 i-flor'dl, and thalamiflorous, a., 

 -Jldr'-us, having the petals and 

 stamens inserted on the thalamus 

 or receptacle. 



thalamium, n., thal-am'-i-urn (L. 

 thalamus, a receptacle), in hot., 

 the layer of reproductive cells in 

 the apothecia of Lichens : thal- 

 amus, n., thattam'tis, the recep- 

 tacle of a flower. 



thalamus opticus, thdV-dm-Us op'- 

 ilk-US, thalami optici, plu., 

 thal'-am-i tip'-tis-i (L. thalamus, a 

 bedroom, a receptacle ; opticus, 

 optic), the posterior ganglia of 

 the brain, which are of an oval 

 shape, and rest on the correspond- 



ing cerebral crura, which they in 

 a manner embrace. 



Thalassa-collida, n. plu., thdl-ds' 

 d-kol'-lid'd (Gr. thalassa, the 

 sea ; Jcolla, glue), a division or 

 group of Protozoa. 



thalline, n., thdl'-m (Gr. thallos, 

 L. thallus, a young shoot or 

 branch), in bot., of the same sub- 

 stance as the thallus : thallodal, 

 a., thdl'fid'dl, in same sense. 



Thallogense, n. plu., thdl-lodf-en-e 

 (Gr. thallds, a young shoot; gZntis, 

 birth, genndo, I beget), a Sub- 

 class of Cryptogamic plants : thal- 

 logens, n. plu., thdl'lo-je'nz, also 

 thallophytes, n. plu., -fltz (Gr. 

 pJiutdn, a plant), plants producing 

 a thallus ; plants bearing their 

 fructification on. a thallus ; also 

 thallophyta, n. plu., thdl-df-U-a, 

 in same sense. 



thallus, Ti.,thdl'lus, also thallome, 

 tlidl'.l8m-Z (Gr. thdllds, a young 

 shoot, a frond), in bot.,& solid mass 

 of cells, consisting of one or more 

 layers, usually in the form of a 

 flat stratum or expansion, or in 

 the form of a lobe, leaf, or frond ; 

 any structure having no morpho- 

 logical distinction of stem and 

 leaves, and from which true roots 

 are absent ; the vegetative system 

 of Lichens. 



Thea, n., thef-d (new L. thed, the 

 tea plant said to be from tcha, 

 the Chinese name for tea), a genus 

 of valuable plants, Ord. Tern- 

 strosiniacese : Thea viridis, vir' 

 %d-is^ (L. viridis, green), the 

 species artificially cultivated in 

 Britain ; but there is said to be 

 only one species, the diiferent 

 teas depending upon their mode 

 of treatment, and their prepara- 

 tion for the market : T. Bohea, 

 bo-he'-d (said to be from Buoy or 

 Booij, a mountain in China), the 

 common black tea, also called 

 T. Cantoniensis, Jcdn>tdn'-t-$ns''is 

 (of or from Canton) : T. Assamica, 

 ds-sdm'-ilc'd (of or from Assam], 

 the Assam tea-plant : theine, n., 



