Part 255

Tri"ose (?), n. [Tri- + - ose.] (Chem.) (a) A sugar derived from a trihydric alcohol. (b) A trisaccharide.

||Tri*pit"a*ka (?), n. [Skr. tripiaka.] The three divisions, or "baskets" (pitakas), of buddhist scriptures, -- the Vinayapitaka [Skr. Vinayapiaka] , or Basket of Discipline; Suttapitaka , or Basket of Discourses; and Abhidhammapitaka , or Basket of Metaphysics.

Tri"plex (?), a. (Mach.) Havingthree principal operative parts or motions, so as to produce a three-fold effect.

Tri*sac"cha*ride (?), n. Also - rid. (Chem.) A complex sugar, as raffinose, yielding by hydrolysis three simple sugar molecules.

{ Tris*kel"i*on (?), or Tris"kele (?) }, n. [Gr. &?; three-legged. See Tri-; Isosceles.] A figure composed of three branches, usually curved, radiating from a center, as the figure composed of three human legs, with bent knees, which has long been used as a badge or symbol of Sicily and of the Isle of Man.

Tri`tu*ber"cu*lar (?), a. (a) Having or designating teeth with three cusps or tubercles; tricuspid. (b) Pertaining to trituberculy.

Tri`tu*ber"cu*ly (?), n. [Pref. tri- + L. tuberculum tubercle.] (Zoöl.) A theory of the development of mammalian molar teeth. The primitive stage is that of simple cones, as in reptiles. The simple cone then developed a smaller cone in front and another behind. Next, a cingulum was developed, and the three cones became arranged in a triangle, the two smaller cusps having moved to the outer side in upper and to the inner in lower molars. This primitive triangle is called the trigon or trigonid and this stage the tritubercular or trigonodont. The trigon being a cutting apparatus, an extension of the posterior part of the crown was developed in lower molars for crushing, and a smaller corresponding part appeared in upper molars. Another large cone then arose, usually from the cingulum. In more complex forms, smaller intermediate cusps appeared.

||Tro"cha (?), n. [Sp., bypath, crossroad.] (Mil.) A line of fortifications, usually rough, constructed to prevent the passage of an enemy across a region. [Sp. Amer.]

Tro"i*lus butterfly (?). A large American butterfly (Papilio troilus). It is black, with yellow marginal spots on the front wings, and blue on the rear.

||Trois` point" (?). [F. trois three.] (Backgammon) The third point from the outer edge on each player's home table.

Tro"jan (?), n. One who shows the pluck, endurance, determined energy, or the like, attributed to the defenders of Troy; -- used chiefly or only in the phrase like a Trojan; as, he endured the pain like a Trojan; he studies like a Trojan.

Trol"ley car. (Elec.) A motor car to which the current is conveyed by means of a trolley.

Trolley wire. A heavy conducting wire on which the trolley car runs and from which it receives the current.

Troop, n. See Boy scout, above.

Troop, v. t. -- To troop the colors or colours (Mil.), in the British army, to perform a ceremony consisting essentially in carrying the colors, accompanied by the band and escort, slowly before the troops drawn up in single file and usually in a hollow square, as in London on the sovereign's birthday.

Troop"er, n. A mounted policeman. [Australia] The black troopers of Queensland are a regiment of aboriginal police, employed chiefly for dispersing wild aborigines who encroach on sheep runs.

Tro"pism (?), n. [Gr. &?; a turning, &?; to turn + -ism.] (Physiol.) Modification of the direction of growth.

||Trop"po (?), adv. [It.] (Mus.) Too much; as, allegro ma non troppo, brisk but not too much so.

Trough (?), n. (Meteor.) The transverse section of a cyclonic area where the barometric pressure, neither rising nor falling, has reached its lowest point.

||Trousse (?), n. [F. See Truss; cf. Trousseau.] A case for small implements; as, a surgeon's trousse.

Trudg"en stroke (?). (Swimming) A racing stroke in which a double over-arm motion is used; -- so called from its use by an amateur named Trudgen, but often erroneously written trudgeon.

True (tr), a. (Biol.) Genuine; real; not deviating from the essential characters of a class; as, a lizard is a true reptile; a whale is a true, but not a typical, mammal.

||Trui`té" (?), a. [F., fr. truite trout.] Having a delicately crackled surface; -- applied to porcelian, etc.

Trunk engine. An engine having a trunk piston, as most internal combustion engines.

Trunk piston. In a single-acting engine, an elongated hollow piston, open at the end, in which the end of the connecting rod is pivoted. The piston rod, crosshead and stuffing box are thus dispensed with.

Trunk steamer. A freight steamer having a high hatch coaming extending almost continuously fore and aft, but not of whaleback form at the sides.

Trust (?), n. 1. An equitable right or interest in property distinct from the legal ownership thereof; a use (as it existed before the Statute of Uses); also, a property interest held by one person for the benefit of another. Trusts are active, or special, express, implied, constructive, etc. In a passive trust the trustee simply has title to the trust property, while its control and management are in the beneficiary.

2. A business organization or combination consisting of a number of firms or corporations operating, and often united, under an agreement creating a trust (in sense 1), esp. one formed mainly for the purpose of regulating the supply and price of commodities, etc.; often, opprobriously, a combination formed for the purpose of controlling or monopolizing a trade, industry, or business, by doing acts in restraint or trade; as, a sugar trust. A trust may take the form of a corporation or of a body of persons or corporations acting together by mutual arrangement, as under a contract or a so-called gentlemen's agreement. When it consists of corporations it may be effected by putting a majority of their stock either in the hands of a board of trustees (whence the name trust for the combination) or by transferring a majority to a holding company. The advantages of a trust are partly due to the economies made possible in carrying on a large business, as well as the doing away with competition. In the United States severe statutes against trusts have been passed by the Federal government and in many States, with elaborate statutory definitions.