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A convex portion of a vessel's figure where a sudden change of shape occurs, as in a canal boat, where a nearly vertical side joins a nearly flat bottom.

An inert gaseous element of the argon group, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152º C.; symbol, Kr; atomic weight, 83.0.

hree isomeric modifications all having the formula C3H6O3. Sarcolactic or paralactic acid occurs chiefly in dead muscle tissue, while ordinary lactic acid results from fermentation. The two acids are alike in having the same constitution (expressed by the name ethylidene lactic acid), but the latter is optically inacti…

A mineral consisting of sulphate of lead, occurring either massive or in long slender prisms, of a greenish white or gray color.

ila, and Helix. -- Land spout, a descent of cloud and water in a conical form during the occurrence of a tornado and heavy rainfall on land. -- Land steward, a person who acts for another in the management of land, collection of rents, etc. -- Land tortoise, Land turtle (Zoöl.), any tortoise that habitually lives on…

A rare element of the group of the earth metals, allied to aluminium. It occurs in certain rare minerals, as cerite, gadolinite, orthite, etc., and was so named from the difficulty of separating it from cerium, didymium, and other rare elements with which it is usually associated. Atomic weight 138.5. Symbol La. [Forme…

A peculiar amyloid substance, colored blue by iodine and sulphuric acid, occurring mainly as an abnormal infiltration into the spleen, liver, etc.

At a time or on an occasion which is the latest of all those spoken of or which have occurred; the last time; as, I saw him last in New York.

A mineral of a light indigo-blue color, occurring in small masses, or in monoclinic crystals; blue spar. It is a hydrous phosphate of alumina and magnesia.

, of a cask of liquor (esp. wine); sediment; dregs; -- used now only in the plural. [Lees occurs also as a form of the singular.] "The lees of wine." Holland. A thousand demons lurk within the lee. Young. The wine of life is drawn, and the mere lees Is left this vault to brag of. Shak.

uit, and are mostly natives of Madagascar and the neighboring islands, one genus (Galago) occurring in Africa. The slow lemur or kukang of the East Indies is Nycticebus tardigradus. See Galago, Indris, and Colugo.

A species of mica, of a lilac or rose-violet color, containing lithia. It usually occurs in masses consisting of small scales. See Mica.

series obtained from spermaceti as a white crystalline solid. It is so called because it occurs in the ethereal salt of lauric acid.

A mineral having a glassy fracture, occurring in translucent trapezohedral crystals. It is a silicate of alumina and potash. It is found in the volcanic rocks of Italy, especially at Vesuvius.

One of certain very minute whitish or colorless granules occurring in the protoplasm of plants and supposed to be the nuclei around which starch granules will form.

A sirupy variety of sugar, rarely obtained crystallized, occurring widely in honey, ripe fruits, etc., and hence called also fruit sugar. It is called levulose, because it rotates the plane of polarization to the left. [Written also lævulose.]C6H12O6.

e between which only an occultation of a star or planet by the moon, in a given case, can occur.

Hydrous sesquixoide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark brown color, yellowish brown powder. It includes bog iron. Also called brown hematite.

A hydrous sulphate of lead and copper occurring in bright blue monoclinic crystals.

A mineral of pale steel-gray color and metallic luster, occurring in isometric crystals, and also massive. It is a sulphide of cobalt containing some nickel or copper.