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Infusoria   Listen
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

... of his inquiry before the Akademie der Wissenschaften, in May 1844, in which he shewed that the dust, so far from being inorganic, contained numerous specimens of a species of flint-shelled animalcules, or infusoria, known as polygastrica, and minute portions of terrestrial plants. The investigation led him to certain conclusions: '1. That meteoric dust-rain is of terrestrial origin. 2. That the same is not a rain of volcanic ...
— Chambers's Edinburgh Journal, No. 432 - Volume 17, New Series, April 10, 1852 • Various

... relates a conversation between Dr. Gale and a gentlemen from the West relative to the introduction of some material into ink to prevent moulding. Dr. Gale had astonished his friend by stating— "will prevent the deposition of the ova of infusoria animalcutae;" when it was suggested that he add "and the sporadic growths of thallogenic cryptograms and be fatal to ...
— Forty Centuries of Ink • David N. Carvalho

... direction of growth by an exaggeration of one of the curvature-elements of which circumnutation consists, so does a Paramoecium change its course by the accentuation of one of the deviations of which its path is built. Jennings has shown that the infusoria, etc., react to stimuli by what is known as the "method of trial." If an organism swims into a region where the temperature is too high or where an injurious substance is present, it changes its course. It then moves forward again, and if ...
— Darwin and Modern Science • A.C. Seward and Others

... the class Infusoria, so called because they were early found to be abundant in various infusions, are characterized by numerous fine cilia or hair-like organs by means of which the organism moves about and procures its food. The well-known ...
— Insects and Diseases - A Popular Account of the Way in Which Insects may Spread - or Cause some of our Common Diseases • Rennie W. Doane

... the influenza doctor. He was a tall man, dressed in a black gown and square cap, and was originally a common soldier in the Prussian service. In 1782 he exhibited in London his solar microscope, and created immense excitement by showing the infusoria of muddy water, etc. Dr. Katerfelto used to say that he was the greatest philosopher since the ...
— Character Sketches of Romance, Fiction and the Drama - A Revised American Edition of the Reader's Handbook, Vol. 3 • E. Cobham Brewer

... Remote Period to the Present Day." She neither had made much progress in the pages of the book nor in the history of civilization; she had not got beyond the age of stone or of bronze; she was still among primitive animal life, among the protozoa, the monads, the infusoria, the vibratiles—in the age of albumen, or gelatinous civilization, as it was called by the author, the sagacity of whose views charmed her. She only interrupted her reading at intervals to lightly ...
— Samuel Brohl & Company • Victor Cherbuliez

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

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