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Palus :: Palus (n.) One of several upright slender calcareous processes which surround the central part of the calicle of certain corals.

Marlstone :: Marlstone (n.) A sandy calcareous straum, containing, or impregnated with, iron, and lying between the upper and lower Lias of England..

Stalagmitic :: Stalagmite (n.) A deposit more or less resembling an inverted stalactite, formed by calcareous water dropping on the floors of caverns; hence, a similar deposit of other material..

Spicule :: Spicule (n.) Any small calcareous or siliceous body found in the tissues of various invertebrate animals, especially in sponges and in most Alcyonaria..

Calcar :: Calcar (n.) A slender bony process from the ankle joint of bats, which helps to support the posterior part of the web, in flight..

Concretion :: Concretion (n.) A rounded mass or nodule produced by an aggregation of the material around a center; as, the calcareous concretions common in beds of clay..

Virgularian :: Virgularian (n.) Any one of numerous species of long, slender Alcyonaria belonging to Virgularia and allied genera of the family Virgularidae. These corals are allied to the sea-pens, but have a long rodlike rhachis inclosing a slender, round or square, calcareous axis. The polyps are arranged in transverse rows or clusters along each side of the rhachis..

Dissepiment :: Dissepiment (n.) One of the transverse, calcareous partitions between the radiating septa of a coral..

Hepar :: Hepar (n.) Any substance resembling hepar proper, in appearance; specifically, in homeopathy, calcium sulphide, called also hepar sulphuris calcareum (/)..

Proostracum :: Proostracum (n.) The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous. See Illust. of Phragmocone..

Lithophyte :: Lithophyte (n.) A hard, or stony, plantlike organism, as the gorgonians, corals, and corallines, esp. those gorgonians having a calcareous axis. All the lithophytes except the corallines are animals..

Testicardines :: Testicardines (n. pl.) A division of brachiopods including those which have a calcareous shell furnished with a hinge and hinge teeth. Terebratula and Spirifer are examples.

Septum :: Septum (n.) One of the radial calcareous plates of a coral.

Corallum :: Corallum (n.) The coral or skeleton of a zoophyte, whether calcareous of horny, simple or compound. See Coral..

Syconium :: Sycones (n. pl.) A division of calcareous sponges.

Longspur :: Longspur (n.) Any one of several species of fringilline birds of the genus Calcarius (or Plectrophanes), and allied genera. The Lapland longspur (C. Lapponicus), the chestnut-colored longspur (C. ornatus), and other species, inhabit the United States..

Sclerenchyma :: Sclerenchyma (n.) The hard calcareous deposit in the tissues of Anthozoa, constituting the stony corals..

Calcareous :: Calcareous (a.) Partaking of the nature of calcite or calcium carbonate; consisting of, or containing, calcium carbonate or carbonate of lime..

Calcar :: Calcar (n.) A curved ridge in the floor of the leteral ventricle of the brain; the calcar avis, hippocampus minor, or ergot..

Calcareo-bituminous :: Calcareo-bituminous (a.) Consisting of, or containing, lime and bitumen..

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