Infusorial earth(Geol.), a deposit of fine, usually white, siliceous material, composed mainly of the shells of the microscopic plants called diatoms. It is used in polishing powder, and in the manufacture of dynamite.

Infusorian
(In`fu*so"ri*an) n. (Zoöl.) One of the Infusoria.

Infusory
(In*fu"so*ry) a. (Zoöl.) Infusorial.

Infusory
(In*fu"so*ry) n.; pl. Infusories (Zoöl.) One of the Infusoria; — usually in the pl.

- ing
(-ing)

1. [For OE. -and, - end, -ind, AS. -ende; akin to Goth. -and-, L. -ant-, -ent-, Gr. .] A suffix used to from present participles; as, singing, playing.

2. [OE. -ing, AS. -ing, - ung.] A suffix used to form nouns from verbs, and signifying the act of; the result of the act; as, riding, dying, feeling. It has also a secondary collective force; as, shipping, clothing.

The Old English ending of the present participle and verbal noun became confused, both becoming -ing.

3. [AS. -ing.] A suffix formerly used to form diminutives; as, lording, farthing.

Ing
(Ing) n. [AS. ing.] A pasture or meadow; generally one lying low, near a river. [Obs. or Prov. Eng.]

Ingannation
(In`gan*na"tion) n. [LL. ingannare to decieve.] Cheat; deception. [Obs.] Sir T. Brown.

Ingate
(In"gate`) n.

1. Entrance; ingress. [Obs.]

Which hath in charge the ingate of the year.
Spenser.

Infusionism
(In*fu"sion*ism) n. The doctrine that the soul is preexistent to the body, and is infused into it at conception or birth; — opposed to traducianism and creationism.

Infusive
(In*fu"sive) a. Having the power of infusion; inspiring; influencing.

The infusive force of Spirit on man.
Thomson.

Infusoria
(||In`fu*so"ri*a) n. pl. [NL.; — so called because found in infusions which are left exposed to the air for a time. See Infuse.] (Zoöl.) One of the classes of Protozoa, including a large number of species, all of minute size.

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.

Infusorial
(In`fu*so"ri*al) a. (Zoöl.) Belonging to the Infusoria; composed of, or containing, Infusoria; as, infusorial earth.


  By PanEris using Melati.

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