THE 



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THR 



ike' in, a bitter principle found in 

 tea. 



tlieca, n., thek'-a, thecse, n. plu., 

 thes'e (Gr. theke, a sheath or case), 

 the case containing the reproduc- 

 tive matter in some flowerless 

 plants; spore cases of Mosses, and 

 such like plants ;. in anat., an 

 organ or a part enclosing another, 

 or which contains, something : 

 thecaphore, n., thek'd-for (Gr. 

 phoreo, I bear), in hot., the 

 roundish stalk on which the ovary 

 of some plants is elevated : thec- 

 asporous, a., thek-ds'-pdr-fa (Gr. 

 spora, seed), applied to Fungi 

 which have their spores placed 

 in thecae : theciferous^ a., thes- 

 if'er'us (L. fero, I bear), bearing 

 thecse or asci. 



Thecosomata, n. plu., thek'8-sdm' 

 at- a (Gr. theke, a sheath ; soma, 

 a body, somattis, of a body), a 

 division of Pteropodous Molluscs, 

 in which the body is protected by 

 an external shell. 



thenar, n., then'dr (Gr. thZnar, 

 the palm of the hand), in anat., 

 the fleshy mass which forms the 

 ball of the thumb, consisting of 

 four muscles: thenal, a., then'al, 

 pert, to or connected with the 

 thenar. 



Theobroma, n., the'-o-brom'-d (Gr. 

 thZtis, a god ; broma, food), a 

 genus of plants, Ord. Bittneriacese : 

 Theobroma cacao, kak-a'-o (said 

 to be from Mexican cacanatl), a 

 species producing the seeds or 

 beans which are the chief ingred- 

 ient in chocolate, and from 

 which the best cocoas are wholly 

 manufactured : theobromine, n. , 

 the'6'brom'in, a crystalline prin- 

 ciple, analogous to caffeine, ob- 

 tained from the cacao beans. 



Theophrasta, n., the'-df-rdst'-a 

 (after Theophrastus, the father 

 of natural history), a genus of 

 plants, Ord. Myrsinaceee : The- 

 ophrasta Jussisei, jus'st-e'-i (after 

 Antoine de Jussieu, a botanist of 

 Paris), a prickly -leaved shrub, 



called Coco in St. Domingo, 

 whose seeds are eatable, and made 

 into a kind of bread. 



therapeutic, a., ther'-ap-ut'ik, also 

 therapeutical, a., -tic-til, (Gr. 

 tJierapeutikos, having the power 

 of healing from therapeuo, I 

 heal), pert, to the healing art ; 

 curative : therapeutics, n. plu., 

 -ut'iks, that department of medic- 

 ine relating to the discovery and 

 application of remedies for the 

 cure of diseases. 



thorax, n., thor'-aks (L. and Gr. 

 thorax, the breast, defensive 

 armour for the breast), the chest; 

 that part of the trunk situated 

 between the neck and the ab- 

 domen, containing the heart, 

 lungs, etc.: thoracic, a., thdr>a 

 ik, of or relating to the thorax : 

 thoracic duct, the common trunk 

 of nearly all the lymphatic vessels 

 of the body, which conveys the 

 great mass of the lymph and 

 chyle into the blood. 



thrombus, n., thr&m'-b&s (Gr. 

 thrombos, a clot of blood), in 

 surg., a plug formed in a vessel 

 during life, or some time before 

 death, generally in veins, but 

 may occur in an artery, or even 

 in the heart : thrombosis, n. , 

 thrtim'bdzsis (Gr. thrdmbosis, a 

 curdling or coagulation), the 

 process of the coagulation of 

 blood in the vessels during life. 



thrum-eyed, a., thrum-id' (Ger. 

 trumm, a short, thick piece), in 

 bot., having short styles in 

 flowers, as when the stigma does 

 not appear at the upper part of 

 the tube of the corolla, as seen in 

 Primula. 



thrush, n., thr&sh (a corruption 

 of Eng. thrust, a breaking out), 

 an affection of the intestinal 

 tract, usually met with in child- 

 ren, as a result of imperfect 

 nutrition, and recognisable by 

 the appearance of white specks 

 and patches in the mouth and 

 throat, which on examination 



