"Acrotomous" is a word in ENGLISH

A mineral relating to the zeolites, usually occurring in square prisms or octahedrons with pearly luster on the cleavage surface. …

One of the elements; a metal of a reddish white color, crystallizing in rhombohedrons. It is somewhat harder than lead, …

The quality possessed by many crystallized substances of splitting readily in one or more definite directions, in which the cohesive …

The act of cleaving or splitting.

Division into laminae, like slate, with the lamination not necessarily parallel to the plane of deposition; -- usually produced by …

A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- so named …

Isometric or monometric; as, cubic cleavage. See Crystallization.

Having a single, distinct, diagonal cleavage; -- said of crystals.

Applied to a form of egg cleavage seen in osseous fishes, which occurs only in a small disk that separates …

Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the …

A brittle gem occurring in light green, transparent crystals, affording a brilliant clinodiagonal cleavage. It is a silicate of alumina …

Capable of being split, cleft, or divided in the direction of the grain, like wood, or along natural planes of …

A method of asexual reproduction among the lowest (unicellular) organisms by means of a process of self-division, consisting of gradual …

Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing commonly in …

The property, possessed by some crystalline rocks, of dividing into plates or slabs, which is due to the cleavage structure …

Lead sulphide; the principal ore of lead. It is of a bluish gray color and metallic luster, and is cubic …

A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly …

An orthorhombic mineral of the pyroxene group, of a grayish or greenish black color, often with a peculiar bronzelike luster …

The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin …

Having a distinct cleavage in a single direction only.