Search the Dictionary

A white crystalline substance consisting of phenol salicylate.

Potassium nitrate; niter, a white crystalline substance, KNO3, having a cooling saline taste, obtained by leaching from certain soils in which it is produced by the process of nitrification (see Nitrification, 2). It is a strong oxidizer, is the chief constituent of gunpowder, and is also used as an antiseptic in curin…

A colorless crystalline substance, isomeric with piperonal, but having weak acid properties. It is extracted from sandalwood.

lwood (Santalum); -- used specifically to designate an acid obtained as a resinous or red crystalline dyestuff, which is called also santalin.

or designating, an acid (distinct from santoninic acid) obtained from santonin as a white crystalline substance.

A white crystalline substance having a bitter taste, extracted from the buds of levant wormseed and used as an anthelmintic. It occassions a peculiar temporary color blindness, causing objects to appear as if seen through a yellow glass.

A white crystalline substance obtained by the decomposition of saponin.

A crystalline nitrogenous substance, formed in the decomposition of creatin (one of the constituents of muscle tissue). Chemically, it is methyl glycocoll.

Any crystalline rock having a foliated structure (see Foliation) and hence admitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar.

A yellow gelatinous or crystalline substance found in broom (Cytisus scoparius) accompanying sparteïne.

A white crystalline substance of a sweetish taste, resembling inosite and metameric with dextrose. It is extracted from the kidney of the dogfish (of the genus Scylium), the shark, and the skate.

obtained by the distillation or saponification of certain oils (as castor oil) as a white crystalline substance.

A variety of gypsum, occuring in transparent crystals or crystalline masses.

sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic- looking substance. It exhibits under the action of light a remarkable variation in electric conductivity, and is used in certain electric apparatus. Symbol Se. Atomic weight 78.9.…

A white crystalline nitrogenous substance obtained by the action of dilute sulphuric acid on silk gelatin.

cially obtained in the free state, usually as a dark brown amorphous powder, or as a dark crystalline substance with a meetallic luster. Its oxide is silica, or common quartz, and in this form, or as silicates, it is, next to oxygen, the most abundant element of the earth's crust. Silicon is characteristically the elem…

e seeds of white mustard (Brassica alba, formerly Sinapis alba), and extracted as a white crystalline substance.

A bitter white crystalline nitrogenous substance, obtained indirectly from oil of mustard and ammonia; -- called also allyl melamine.

1H12O5) related to gallic acid, and obtained by the decomposition of sinapine, as a white crystalline substance.

the seeds of mustard. It is extracted, in combination with sulphocyanic acid, as a white crystalline substance, having a hot, bitter taste. When sinapine is isolated it is unstable and undergoes decomposition.