diatom earth
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Diatom — For a molecule of two atoms, see Diatomic molecule. Diatoms Marine diatoms Scientific classification Domain … Wikipedia
diatom — /duy euh teuhm tom /, n. any of numerous microscopic, unicellular, marine or freshwater algae of the phylum Chrysophyta, having cell walls containing silica. [1835 45; < NL Diatoma orig. a genus name, fem. n. based on Gk diátomos cut in two. See… … Universalium
diatom — An individual of microscopic unicellular algae, the shells of which compose a sedimentary infusorial earth. [G. diatomos, cut in two] * * * di·a·tom dī ə .täm n any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae … Medical dictionary
diatom — noun Etymology: ultimately from Greek diatomos cut in half, from diatemnein to cut through, from dia + temnein to cut more at tome Date: 1845 any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified… … New Collegiate Dictionary
diatom filter — diatomaceous earth used to remove very fine particles from the water in aquaria. They clog quickly and are only used occasionally as water polishers rather than continuously … Dictionary of ichthyology
earth — 1. Soil; the soft material of the land, as opposed to rock and sand. 2. An easily pulverized mineral. 3. An insoluble oxide of aluminum or of certain other elements characterized by a high melting point. [A.S. eorthe] alkaline earths alkaline e.… … Medical dictionary
Diatomaceous earth — A sample of diatomaceous earth Diatomaceous earth ( / … Wikipedia
diatomaceous earth — noun a light soil consisting of siliceous diatom remains and often used as a filtering material • Syn: ↑diatomite, ↑kieselguhr • Hypernyms: ↑earth, ↑ground, ↑filter … Useful english dictionary
diatomaceous earth — noun Date: 1883 a light friable siliceous material derived chiefly from diatom remains and used especially as a filter … New Collegiate Dictionary
diatomaceous earth — noun A light soil consisting of siliceous diatom remains and often used as a filtering material or microabrasive … Wiktionary
North African climate cycles — have a unique history that can be traced back millions of years. The cyclic climate pattern of the Sahara is characterized by significant shifts in the strength of the North African Monsoon. When the North African Monsoon is at its strongest… … Wikipedia
