serw-MX  [xml]  
 


    
 DeCS Categories

B01 Eukaryota .
B01.050 Animals .
B01.050.500 Invertebrates .
B01.050.500.091 Annelida .
B01.050.500.091.657 Oligochaeta .
D01 Inorganic Chemicals .
D01.268 Elements .
D01.268.552 Metals, Alkaline Earth .
D01.268.558 Metals, Rare Earth .
D01.552 Metals .
D01.552.539 Metals, Alkaline Earth .
D01.552.550 Metals, Rare Earth .
E07 Equipment and Supplies .
E07.305 Electrical Equipment and Supplies .
E07.305.906 Wearable Electronic Devices .
E07.305.906.500 Hearing Aids .
E07.814 Sensory Aids .
E07.814.458 Hearing Aids .
 
 Terms
 Synonyms & Historicals
Documents
LILACS e MDL
 
Metals, Rare Earth .
Earth Metals, Rare .
Rare Earth Metals .
A group of elements that include SCANDIUM; YTTRIUM; and the LANTHANOID SERIES ELEMENTS. Historically, the rare earth metals got their name from the fact that they were never found in their pure elemental form, but as an oxide. In addition they were very difficult to purify. They are not truly rare and comprise about 25% of the metals in the earth's crust. .
1.00
 
Metals, Alkaline Earth .
Group 2 Elements .
Earth Metals, Alkaline .
Elements, Group 2 .
Alkaline Earth Metals .
Metals that constitute the group 2 (formerly group IIa) of the periodic table. .
0.60
 
Metals .
Electropositive chemical elements characterized by ductility, malleability, luster, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. (Grant & Hackh's Chemical Dictionary, 5th ed) .
0.53
 
Oligochaeta .
Eisenia fetida .
Earthworm .
Eisenia fetidas .
Eisenia foetidas .
Eisenia worms .
Lumbricus terrestri .
Oligochaetas .
fetida, Eisenia .
foetidas, Eisenia .
terrestris, Lumbricus .
worm, Eisenia .
Earthworms .
Eisenia foetida .
Eisenia worm .
Lumbricus .
Lumbricus terrestris .
Eisenia Worms .
Eisenia .
A class of annelid worms with few setae per segment. It includes the earthworms such as Lumbricus and Eisenia. .
0.41
 
Hearing Aids .
Aid, Hearing .
Aids, Hearing .
Ear Mold .
Hearing Aid .
Mold, Ear .
Molds, Ear .
Ear Molds .
Wearable sound-amplifying devices that are intended to compensate for impaired hearing. These generic devices include air-conduction hearing aids and bone-conduction hearing aids. (UMDNS, 1999) .
0.40