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formula, in chemistry

(Encyclopedia)formula, in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent chemical reactions....

linden, in botany

(Encyclopedia)CE5 Linden, Tilia americana linden, common name for the Tiliaceae, a family of chiefly woody shrubs and trees. Most genera are tropical, but the genus Tilia, commonly called linden, or lime tree, ...

lute

(Encyclopedia)CE5 Lute lute, musical instrument that has a half-pear-shaped body, a fretted neck, and a variable number of strings, which are plucked with the fingers. The long lute, with its neck much longer t...

aschelminths

(Encyclopedia)CE5 Internal anatomy of a female rotifer, representative of the phylum Aschelminthes aschelminths ăsk-hĕlmĭnˈthz [key], large assemblage of loosely related, wormlike organisms of extremely var...

conic section

(Encyclopedia)CE5 Conic sections conic section or conic kŏnˈĭk [key], curve formed by the intersection of a plane and a right circular cone (conical surface). The ordinary conic sections are the circle, the ...

trilobite

(Encyclopedia)CE5 Dorsal view of a trilobite trilobite trīˈləbītˌ [key], subphylum of the phylum Arthropoda that includes a large group of extinct marine animals that were abundant in the Paleozoic era. Th...

valine

(Encyclopedia)CE5 valine vălˈēn [key], organic compound, one of the 22 α-amino acids commonly found in animal proteins. Only the l-stereoisomer appears in mammalian protein. It is one of several essential am...

furfural

(Encyclopedia)CE5 furfural fûrˌfərălˈdəhīd [key] [Lat.,=bran], C4H3OCHO, viscous, colorless liquid that has a pleasant aromatic odor; upon exposure to air it turns dark brown or black. It boils at about 1...

gall bladder

(Encyclopedia)CE5 Gall bladder gall bladder, small pear-shaped sac that stores and concentrates bile. It is connected to the liver (which produces the bile) by the hepatic duct. When food containing fat reaches...

aorta

(Encyclopedia)CE5 Aorta aorta āôrˈtə [key], primary artery of the circulatory system in mammals, delivering oxygenated blood to all other arteries except those of the lungs. The human aorta, c.1 in. (2.54 c...