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psilophytales
Science; General science
A group long recognized as an order of fossil plants (subdivision Psilopsida) collected in rocks of Late Silurian and Devonian age. It has been subdivided, on the basis of many ...
montmorillonite
Science; General science
A group name for all clay minerals with an expanding structure, except vermiculite, and also a specific mineral name for the high alumina end member of the group.
sedentaria
Science; General science
A group of 28 or more families of polychaete annelids in which the anterior, or cephalic, region is more or less completely concealed by overhanging peristomial structures, or the ...
errantia
Science; General science
A group of 34 families of Polychaeta in which the anterior, or cephalic, region is more or less fully exposed and the body is often long, linear to short, and depressed. The ...
thermal analysis
Science; General science
A group of analytical techniques developed to continuously monitor physical or chemical changes of a sample which occur as the temperature of a sample is increased or decreased. ...
cephalosporins
Science; General science
A group of antibiotics that are effective in eradicating streptococcal, pneumococcal, staphylococcal, Klebsiella , Neisseria , enteric gram-negative rod bacteria that produce ...
fescue
Science; General science
A group of approximately 100 species of grass; more than 30 are represented in the United States. Tall fescue ( Festuca arundinacea ), a perennial cool-season plant introduced ...
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