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tyla, and Artiodactyla, but by later writers it is generally restricted to the two latter groups (Ungulata). They feed almost exclusively upon vegetation.

To associate; to ally one's self with, or place one's self among, a group or company. I'll herd among his friends, and seem One of the number. Addison.

A group of birds including the trogons.

Belonging to the Hexactinellinæ, a group of sponges, having six-rayed siliceous spicules.

Any member of a group of sugars containing six carbon atoms in the molecule. Some are widely distributed in nature, esp. in ripe fruits.

A single cluster or group of plants growing close together, and having the earth heaped up about them; as, a hill of corn or potatoes. [U. S.] Hill ant (Zoöl.), a common ant (Formica rufa), of Europe and America, which makes mounds or ant-hills over its nests. -- Hill myna (Zoöl.), one of several species of birds of I…

A member of an ancient people (or perhaps group of peoples) whose settlements extended from Armenia westward into Asia Minor and southward into Palestine. They are known to have been met along the Orontes as early as 1500 b. c., and were often at war with the Egyptians and Assyrians. Especially in the north they develo…

A group of ciliated Infusoria, having cilia all over the body.

homoplasy with each other, these having arisen independently since the divergence of both groups from a univentricular ancestor.

extended sense, the term is applied to the relation between chemical elements of the same group; as, chlorine, bromine, and iodine are said to be in homology with each other. Cf. Heterology. General homology (Biol.), the higher relation which a series of parts, or a single part, bears to the fundamental or general type…

A large conical brick structure around which the firing kilns are grouped. Knight.

A linguistic group of warlike North American Indians, belonging to the same stock as the Algonquins, and including several tribes, among which were the Five Nations. They formerly occupied the region about Lakes Erie and Ontario, and the larger part of New York.

A species of the feldspar group containing barium. See Feldspar.

One of a group of crystalline bodies produced by the action of ammonia on certain aldehydes.

drazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.

The group of hydroids to which the fresh-water hydras belong.

Resembling hydrocephalus. Hydrocephaloid affection (Med.), the group of symptoms which follow exhausting diarrhea in young children, resembling those of acute hydrocephalus, or tubercular meningitis.

xyl as an ingredient. Hydroxy acid (Chem.), an organic acid, having (besides the hydroxyl group of the carboxyl radical) an alcoholic hydroxyl group, and thus having the qualities of an alcohol in addition to its acid properties; as, lactic and tartaric acids are hydroxy acids.

A compound radical, or unsaturated group, HO, consisting of one atom of hydrogen and one of oxygen. It is a characteristic part of the hydrates, the alcohols, the oxygen acids, etc.

An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface.