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Infusoria   Listen
noun
Infusoria  n. pl.  (Zool.) One of the classes of Protozoa, including a large number of species, all of minute size. Formerly, the term was applied to any microbe found in infusions of decaying organic material, but the term is now applied more specifically to one of the classes of the phylum Ciliophora, of ciliated protozoans. Note: (From 1913 dictionary): They are found in all seas, lakes, ponds, and streams, as well as in infusions of organic matter exposed to the air. They are distinguished by having vibrating lashes or cilia, with which they obtain their food and swim about. They are devided into the orders Flagellata, Ciliata, and Tentaculifera. See these words in the Vocabulary. Formely the term Infusoria was applied to all microscopic organisms found in water, including many minute plants, belonging to the diatoms, as well as minute animals belonging to various classes, as the Rotifera, which are worms; and the Rhizopoda, which constitute a distinct class of Protozoa. Fossil Infusoria are mostly the siliceous shells of diatoms; sometimes they are siliceous skeletons of Radiolaria, or the calcareous shells of Foraminifera.






Collaborative International Dictionary of English 0.48








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"Infusoria" Quotes from Famous Books



... is no work extant in which so much valuable information concerning Infusoria (Animalcules) can be found, and every Microscopist should add it ...
— Notes and Queries, Number 217, December 24, 1853 • Various

... grant there will generally be a tendency to advance in complexity of organisation, though in beings fitted for very simple conditions it would be slight and slow. How could a complex organisation profit a monad? if it did not profit it there would be no advance. The Secondary Infusoria differ but little from the living. The parent monad form might perfectly well survive unaltered and fitted for its simple conditions, whilst the offspring of this very monad might become fitted for more complex ...
— The Life and Letters of Charles Darwin, Volume II • Francis Darwin

... this is not necessary; for Nature furnishes all the food that is needed, in the spores thrown off by the seaweed, in the seaweed itself, whose growth is generally sufficiently rapid to make up for the ravages committed upon it, and in the host of infusoria constantly produced in the water. If any of the creatures die, their bodies should be immediately removed,—though sometimes the omnivorous crabs will do this work rapidly enough. As the water evaporates, it should be filled up to its original ...
— The Atlantic Monthly, Volume 2, Number 9, July, 1858 • Various



Words linked to "Infusoria" :   infusorian, Ciliophora, class Ciliata, class Ciliophora, Ciliata, class, subclass Infusoria



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