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Partaking of the nature ofcalcite or calcium carbonate; consisting of, or containg, calcium carbonate or carbonate of lime. Clcareous spar. See as Calcite.

Quality of being calcareous.

Consisting of, or containing, clay and calcareous earth.

Formed of a mixture of horny and calcareous materials, as some shells and corals.

Partaking of the nature of, or consisting of, mica and lime; -- applied to a mica schist containing carbonate of lime.

Half or partially calcareous; as, a semicalcareous plant.

Consisting of silica and calcareous matter.

One of the anchor-shaped spicules of certain sponges; also, one of the calcareous spinules of certain Holothurians, as in species of Synapta. Anchor ice. See under Ice. -- Anchor ring. (Math.) Same as Annulus, 2 (b). -- Anchor stock (Naut.), the crossbar at the top of the shank at right angles to the arms. -- The an…

ts hot springs, which has given its name to various objects. Bath brick, a preparation of calcareous earth, in the form of a brick, used for cleaning knives, polished metal, etc. -- Bath chair, a kind of chair on wheels, as used by invalids at Bath. "People walked out, or drove out, or were pushed out in their Bath ch…

A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell o…

in is specially affected; any acute cerebral affection attended by fever. -- Brain sand, calcareous matter found in the pineal gland.

consisting of, or containing, calcareous and argillaceous earths.

Consisting of, or containing calcareous and siliceous earths.

, immediately succeeding the Cambrian period. The name alludes to the peculiar mixture of calcareous and siliceous characteristics in many of the beds. See the Diagram under Grology.

The process of chenge into a stony or calcareous substance by the deposition of lime salt; -- normally, as in the formation of bone and teeth; abnormally, as in calcareous degeneration of tissue.

Consisting of, or containing, calcareous matter or lime salts; calcareous.

To make stony or calcareous by the deposit or secretion of salts of lime.

An order of marine sponges, containing calcareous spicules. See Porifera.

rom aragonite. It includes common limestone, chalk, and marble. Called also calc-spar and calcareous spar.

Having the skeleton in the state of cartilage, the bones containing little or no calcareous matter; said of certain fishes, as the sturgeon and the sharks.