English English Dictionary

A silver coin among the ancient Greeks, of the value of four drachms.

A telluride of bismuth. It is of a pale steel-gray color and metallic luster, and usually occurs in foliated masses. Called also telluric bismuth.

A Linnaean class of plants having six stamens, four of which are longer than the others.

A plant of the order Tetradynamia.

Alt. of Tetradynamous

Belonging to the order Tetradynamia; having six stamens, four of which are uniformly longer than the others.

A plane figure having four sides and angles; a quadrangle, as a square, a rhombus, etc.

An aspect of two planets with regard to the earth when they are distant from each other ninety degrees, or the fourth of a circle.

Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.

Having four prominent longitudinal angles.

Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization.

The mystic number four, which was often symbolized to represent the Deity, whose name was expressed by four letters among some ancient nations; as, the Hebrew JeHoVaH, Greek qeo`s, Latin deus, etc.

A Linnaean order of plants having four styles.

Alt. of Tetragynous

Belonging to the order Tetragynia; having four styles.

Having, or composed of, four sides.

Having the form of the regular tetrahedron.

Pertaining or related to a tetrahedron, or to the system of hemihedral forms to which the tetrahedron belongs.

In a tetrahedral manner.

A sulphide of antimony and copper, with small quantities of other metals. It is a very common ore of copper, and some varieties yield a considerable presentage of silver. Called also gray copper ore, fahlore, and panabase.