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ican gray fox (V. Virginianus), and the arctic, white, or blue, fox (V. lagopus) are well-known species.

f the genus Fregata; -- called also man-of-war bird, and frigate pelican. Two species are known; that of the Southern United States and West Indies is F. aquila. They are remarkable for their long wings and powerful flight. Their food consists of fish which they obtain by robbing gulls, terns, and other birds, of their…

irds, of the family procellariidæ, allied to the albatrosses and petrels. Among the well- known species are the arctic fulmar (Fulmarus glacialis) (called also fulmar petrel, malduck, and mollemock), and the giant fulmar (Ossifraga gigantea).

acid (Chem.), a complex acid, H2C2N2O2, isomeric with cyanic and cyanuric acids, and not known in the free state, but forming a large class of highly explosive salts, the fulminates. Of these, mercuric fulminate, the most common, is used, mixed with niter, to fill percussion caps, charge cartridges, etc. -- Fulminic…

ulminuric acid (Chem.), a white, crystalline, explosive subatance, H3C3N3O3, forming well known salts, and obtained from the fulnunates. It is isomeric with cyanuric acid, and hence is also called isocyanuric acid.

lesion or change of structure; the derangement of an organ arising from a cause, often unknown, external to itself opposed to organic disease, in which the organ itself is affected.

A heterogenous group of fungi of which the complete life history is not known. Some undoubtedly represent the conidium stages of various Ascomycetes. The group is divided into the orders Sphæropsidales, Melanconiales, and Moniliales.

served at, table. Those species of animals . . . distinguished from the rest by the well-known appellation of game. Blackstone. Confidence game. See under Confidence. -- To make game of, to make sport of; to mock. Milton.

tever is prepared for use or wear; manufactured stuff or material. Clad in a vesture of unknown gear. Spenser.

nt heron (Zoöl.), a very large African heron (Ardeomega goliath). It is the largest heron known. -- Giant kettle, a pothole of very large dimensions, as found in Norway in connection with glaciers. See Pothole. -- Giant powder. See Nitroglycerin. -- Giant puffball (Bot.), a fungus (Lycoperdon giganteum), edible when…

s; jargon. He, like a gypsy, oftentimes would go; All kinds of gibberish he had learnt to known. Drayton. Such gibberish as children may be heard amusing themselves with. Hawthorne.

ma suspectum) native of the dry plains of Arizona, New Mexico, etc. It is the only lizard known to have venomous teeth.

A plant of the genus Zingiber, of the East and West Indies. The species most known is Z. officinale.

A musical instrument, of unknown character, supposed by some to have been used by the people of Gath, and thence obtained by David. It is mentioned in the title of Psalms viii., lxxxi., and lxxxiv. Dr. W. Smith.

To set forth as a known quantity or a known relation, or as a premise from which to reason; -- used principally in the passive form given.

Granted; assumed; supposed to be known; set forth as a known quantity, relation, or premise.

ess, lymphatic, pineal, and pituitary glands, the functions of which are very imperfectly known.

Sulphate of soda, a well-known cathartic. It is a white crystalline substance, with a cooling, slightly bitter taste, and is commonly called "salts."

ning to the Glaucium or horned poppy; -- formerly applied to an acid derived from it, now known to be fumaric acid.

P. Sidney. Jewels lose their glory if neglected. Shak. Your sex's glory 't is to shine unknown. Young.