Search the Dictionary

A white, crystalline, poisonous substance, regarded as a glucoside, extracted from the lily of the valley (Convallaria Majalis). Its taste is first bitter, then sweet.

A white, crystalline glucoside, of an irritating taste, extracted from the convallaria or lily of the valley.

Green vitriol, or sulphate of iron; a green crystalline substance, of an astringent taste, used in making ink, in dyeing black, as a tonic in medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.

A bitter principle obtained from dogwood (Cornus florida), as a white crystalline substance; -- called also cornic acid.

irritating action on the body tissue. Usually it is in the form of a heavy, transparent, crystalline substance, easily soluble, and of an acrid, burning taste. It is a virulent poison, a powerful antiseptic, and an exellent antisyphilitic; called also mercuric bichloride. It is to be carefully distinguished from calom…

The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

A white, crystalline substance, C12H13NO3, obtained as a product of the decomposition of narcotine. It has weak basic properties, and is usually regarded as an alkaloid.

eries of aromatic acids, related to cinnamic acid, the most important of which is a white crystalline substance, HO.C6H4.C2H2.CO2H, obtained from the tonka bean, sweet clover, etc., and also produced artifically.

merly Coumarouna) odorata and consisting essentially of coumarin proper, which is a white crystalline substance, C9H6O2, of vanilla- like odor, regarded as an anhydride of coumaric acid, and used in flavoring. Coumarin in also made artificially.

surface of the liquor in the process of purification by recrystallization. It is a white crystalline substance, with a gritty acid taste, and is used very largely as an ingredient of baking powders; -- called also potassium bitartrate, acid potassium tartrate, etc.

A white, crystalline, nitrogenous substance found abundantly in muscle tissue. [Written also kreatine.]

A white, crystalline, nitrogenous body closely related to creatin but more basic in its properties, formed from the latter by the action of acids, and occurring naturally in muscle tissue and in urine. [Written also kretinine.]

A white crystalline sugar, metameric with glucose, obtained from the coloring matter of saffron. [Written also crokose.]

ved from, a plant of the genus Croton, or from croton oil. Crotonic acid (Chem.), a white crystalline organic acid, C3H5.CO2H, of the ethylene, or acrylic acid series. It was so named because formerly supposed to exist in croton oil. Also, any acid metameric with crotonic acid proper.

A colorless crystalline alkaloid obtained in small quantities from opium.

Consisting of, or like, crystal; clear; transparent; lucid; pellucid; crystalline. Through crystal walls each little mote will peep. Shak. By crystal streams that murmur through the meads. Dryden. The crystal pellets at the touch congeal, And from the ground rebounds the ratting hail. H. Brooks.

ral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc.

To cause to form crystals, or to assume the crystalline form.

The science of the crystalline structure of inorganic bodies.

erived from, cumin, or from oil of caraway; as, cuminic acid. Cuminic acid (Chem.), white crystalline substance, C3H7.C6H4.CO2H, obtained from oil of caraway.