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 .
SP8 Disasters .
SP8.946 Disaster Management .
SP8.946.117 Emergency Watch .
SP8.946.117.226 Relief, Assistance and Protection in Disasters .
SP8.946.117.226.271 Telecommunication Network .
SP8.946.117.226.271.233 Earth Station .
 
 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
31571
 
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. .
0.55
3392
 
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
20437768
 
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
634431
 
Earth Station .
Communications station situated either on land (or ship) or on an airplane with the purpose of communicating with one or several space stations and linked with other earth stations through space network (Material V - Gunn, S.W.A. Multilingual Dictionary of Disaster Medicine and International Relief, 1990) .
0.39
00