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tameric with phthalic acid, and obtained, as a tasteless white crystalline powder, by the oxidation of oil of turpentine; -- called also paraphthalic acid. Cf. Phthalic.

are regarded as having different functions or relations in the molecule; thus, sodic hydroxide, NaOH, is a ternary compound.

acid), homologous with terebic acid, and obtained as a white crystalline substance by the oxidation of oil of turpentine with chromic acid.

ance or ingredient denoted by the term to which it is prefixed, as in tetra-chloride, tetroxide.

h the element has a higher valence as contrasted with the thallous compounds; as, thallic oxide.

le as antipyretics; -- so called from the green color produced in its solution by certain oxidizing agents.

anufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.

A rare white earthy substance, consisting of the oxide of thorium; -- formerly called also thorina.

Oxide of thulium.

An elementary substance found as an oxide in the mineral cassiterite, and reduced as a soft white crystalline metal, malleable at ordinary temperatures, but brittle when heated. It is not easily oxidized in the air, and is used chiefly to coat iron to protect it from rusting, in the form of tin foil with mercury to for…

t, or the third degree of that to the name of which it is prefixed; as in trisulphide, trioxide, trichloride.

o, or designating, a tribasic acid, C6H3.(CO2)3, of the aromatic series, obtained, by the oxidation of mesitylene, as a white crystalline substance. [Written also trimesic.]

ty of crystallizing in three forms fundamentally distinct, as is the case with titanium dioxide, which crystallizes in the forms of rutile, octahedrite, and brookite. See Pleomorphism.

or pertaining to tungsten; derived from, or resembling, tungsten; wolframic; as, tungstic oxide. Tungstic acid, an acid of tungsten, H2WO4, analogous to sulphuric and chromic acids.

The oxide of tungsten, a yellow mineral occurring in a pulverulent form. It is often associated with wolfram.

ric; resembling, or obtained from, turmeric; specif., designating an acid obtained by the oxidation of turmerol. Turmeric paper (Chem.), paper impregnated with turmeric and used as a test for alkaline substances, by which it is changed from yellow to brown. -- Turmeric root. (Bot.) (a) Bloodroot. (b) Orangeroot.…

imation product in the flues of smelting furnaces of zinc, and consisting of a crude zinc oxide.

n both oil and water colors, obtained from certain natural clays variously colored by the oxides of iron and manganese. It is commonly heated or burned before being used, and is then called burnt umber; when not heated, it is called raw umber. See Burnt umber, below.

A yellow, earthy incrustation, consisting essentially of the oxide of uranium, but more or less impure.

A mineral consisting chiefly of uranium oxide with some lead, thorium, etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.