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Consisting of gum; viscous; adhesive; producing or containing gum; covered with gum or a substance resembling gum. Kindles the gummy bark of fir or pine. Milton. Then rubs his gummy eyes. Dryden. Gummy tumor (Med.), a gumma.

A black, granular, explosive substance, consisting of an intimate mechanical mixture of niter, charcoal, and sulphur. It is used in gunnery and blasting.

Yielding gum or resinous substances.

Any flimsy substance unspun, as raw silk.

A substance found in the blood of the octopus, which gives to it its blue color.

A brownish substance sometimes found in the blood, in cases of jaundice.

A substance formed from the hematin of blood, by removal of the iron through the action of concentrated sulphuric acid. Two like bodies, called respectively hæmatoporphyrin and hæmatolin, are formed in a similar manner.

Blood formative; -- applied to a substance in early fetal life, which breaks up gradually into blood vessels.

The coloring principle of logwood. It is obtained as a yellow crystalline substance, C16H14O6, with a sweetish taste. Formerly called also hematin.

A haloid substance.

Hard solder. See under Solder. -- Hard water, water, which contains lime or some mineral substance rendering it unfit for washing. See Hardness, 3.- Hard wood, wood of a solid or hard texture; as walnut, oak, ash, box, and the like, in distinction from pine, poplar, hemlock, etc.- In hard condition, in excellent condi…

A filamentous substance; especially, the filaments of flax or hemp.

ne (in the Peganum harmala), and obtained from it by oxidation. It is a white crystalline substance.

e depressed soft palate and the root of the tongue, thus aiding in the removal of foreign substances.

motion of the ultimate particles of matter. Heat engine, any apparatus by which a heated substance, as a heated fluid, is made to perform work by giving motion to mechanism, as a hot-air engine, or a steam engine. -- Heat producers. (Physiol.) See under Food. -- Heat rays, a term formerly applied to the rays near th…

A neutral organic substance found in the root of the elecampane (Inula helenium), and extracted as a white crystalline or oily material, with a slightly bitter taste.

A glucoside obtained as a white crystalline substance by partial oxidation of salicin, from a willow (Salix Helix of Linnæus.)

mpanying helleborin in several species of hellebore, and extracted as a white crystalline substance with a bittersweet taste. It has a strong action on the heart, resembling digitalin.

ous glucoside found in several species of hellebore, and extracted as a white crystalline substance with a sharp tingling taste. It possesses the essential virtues of the plant; -- called also elleborin.

A composition made from blood, mixed with mineral or vegetable substances, used for making buttons, door knobs, etc.