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pentastomida
Science; General science
A subclass of bloodsucking crustacean arthropods, parasitic in the respiratory organs of vertebrates, that frequently are referred to as the Linguatulida or tongue worms. The ...
copepoda
Science; General science
A subclass of Crustacea with eight orders. There are over 6000 species, most of which are free-living in aqueous environments, though many are parasitic or symbiotic with other ...
euechinoidea
Science; General science
A subclass of Echinoidea (sea urchins, sand dollars, and heart urchins) in which the test plates are consistently arranged in double rows or columns. Five double rows bear the ...
perischoechinoidea
Science; General science
A subclass of Echinoidea lacking stability in the number of columns of plates that make up the ambulacra and interambulacra. The ambulacral columns vary from 2 to 20, the ...
inhibitor (chemistry)
Science; General science
A substance which is capable of stopping or retarding a chemical reaction. To be technically useful, such compounds must be effective in low concentrations, usually under 1%. The ...
aquifer
Science; General science
A subsurface zone that yields economically important amounts of water to wells. The term is synonymous with water-bearing formation. An aquifer may be porous rock, ...
gulf of mexico
Science; General science
A subtropical semienclosed sea bordering the western North Atlantic Ocean. It connects to the Caribbean Sea on the south through the Yucatán Channel and with the Atlantic on the ...
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