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Coccolith :: Coccolith (n.) One of a kind of minute, calcareous bodies, probably vegetable, often abundant in deep-sea mud..

Anchor :: Anchor (n.) One of the anchor-shaped spicules of certain sponges; also, one of the calcareous spinules of certain Holothurians, as in species of Synapta..

Pluteus :: Pluteus (n.) The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods..

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..

Lithocyst :: Lithocyst (n.) A sac containing small, calcareous concretions (otoliths). They are found in many Medusae, and other invertebrates, and are supposed to be auditory organs..

Synarchy :: Synapticula (n.) One of numerous calcareous processes which extend between, and unite, the adjacent septa of certain corals, especially of the fungian corals..

Conglomerate :: Conglomerate (n.) A rock, composed or rounded fragments of stone cemented together by another mineral substance, either calcareous, siliceous, or argillaceous; pudding stone; -- opposed to agglomerate. See Breccia..

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

Calcarated :: Calcarated (a.) Having a spur, as the flower of the toadflax and larkspur; spurred..

Micaceo-calcareous :: Micaceo-calcareous (a.) Partaking of the nature of, or consisting of, mica and lime; -- applied to a mica schist containing carbonate of lime..

Corneocalcareous :: Corneocalcareous (a.) Formed of a mixture of horny and calcareous materials, as some shells and corals..

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

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

Echinoidea :: Echinoidea (n. pl.) The class Echinodermata which includes the sea urchins. They have a calcareous, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See Spatangoid, Clypeastroid..

Calcar :: Calcar (n.) A spur, or spurlike prominence..

Calcareo-argillaceous :: Calcareo-argillaceous (a.) consisting of, or containing, calcareous and argillaceous earths..

Phlebolith :: Phlebolith (n.) A small calcareous concretion formed in a vein; a vein stone.

Semicalcareous :: Semicalcareous (a.) Half or partially calcareous; as, a semicalcareous plant..

Turbo :: Turbo (n.) Any one of numerous marine gastropods of the genus Turbo or family Turbinidae, usually having a turbinate shell, pearly on the inside, and a calcareous operculum..

Calcareo-siliceous :: Calcareo-siliceous (a.) Consisting of, or containing calcareous and siliceous earths..

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