Thong seal(Zoöl.), the bearded seal. See the Note under Seal.

(Tho"oid) a. [Gr. the jacal + -oid.] (Zoöl.) Of or pertaining to a group of carnivores, including the wovels and the dogs.

(Thor) n. [Icel. þors. Cf. Thursday.] (Scand. Myth.) The god of thunder, and son of Odin.

(||Tho`ra*cen*te"sis) n. [NL., fr. Gr. thorax + pricking, from to prick, stab.] (Surg.) The operation of puncturing the chest wall so as to let out liquids contained in the cavity of the chest.

(Tho*rac"ic) a. [Cf. F. thoracique.] (Anat.) Of or pertaining to the thorax, or chest.

Thoracic duct(Anat.), the great trunk of the lymphatic vessels, situated on the ventral side of the vertebral column in the thorax and abdomen. See Illust. of Lacteal.

(Tho*rac"ic), n. [Cf. F. thoracique.] (Zoöl.) One of a group of fishes having the ventral fins placed beneath the thorax or beneath the pectorial fins.

(||Tho*rac"i*ca) n. pl. [NL.] (Zoöl.) A division of cirripeds including those which have six thoracic segments, usually bearing six pairs of cirri. The common barnacles are examples.

(Tho`ra*com"e*ter) n. (Physiol.) Same as Stethometer.

(Tho`ra*co*plas"ty) n. [Thorax + plasty.] (Med.) A remodeling or reshaping of the thorax; especially, the operation of removing the ribs, so as to obliterate the pleural cavity in cases of empyema.

(||Tho`ra*cos"tra*ca) n. pl. [NL. See Thorax, and Ostracoid, a.] (Zoöl.) An extensive division of Crustacea, having a dorsal shield or carapec niting all, or nearly all, of the thoracic somites to the head. It includes the crabs, lobsters, shrimps, and similar species.

(Tho`ra*cot"o*my) n. [Gr. thorax + to cut.] (Surg.) The operation of opening the pleural cavity by incision.

(Thom"sen*o*lite) n. [Named after Dr. J. Thomsen of Copenhagen. See -lite.] (Min.) A fluoride of aluminium, calcium, and sodium occurring with the cryolite of Greenland.

Thomsen's disease
(Thom"sen's dis*ease") [From Thomsen, a physician of Sleswick.] (Med.) An affection apparently congenital, consisting in tonic contraction and stiffness of the voluntary muscles occurring after a period of muscular inaction.

(Thom*so"ni*an) a. (Med.) Of or pertaining to Thomsonianism.n. A believer in Thomsonianism; one who practices Thomsonianism.

(Thom*so"ni*an*ism) n. (Med.) An empirical system which assumes that the human body is composed of four elements, earth, air, fire, and water, and that vegetable medicines alone should be used; — from the founder, Dr. Samuel Thomson, of Massachusetts.

(Thom"son*ite) n. [From R. D. Thomson, of Glasgow.] (Min.) A zeolitic mineral, occurring generally in masses of a radiated structure. It is a hydrous silicate of aluminia, lime, and soda. Called also mesole, and comptonite.

(Thong) n. [OE. thong, þwong, thwang, AS. þwang; akin to Icel. þvengr a thong, latchet. &radic57. Cf. Twinge.] A strap of leather; especially, one used for fastening anything.

And nails for loosened spears, and thongs for shields, provide.

  By PanEris using Melati.

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