atomic_number_57 (HyperDic hyper-dictionary)

English > 1 sense of the expression *atomic number 57*:
NOUN	substance	atomic number 57, lanthanum, La	a white soft metallic element that tarnishes readily

English > *atomic number 57*: 1 sense > noun 1, substance
Meaning	A white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth.
Synonyms	lanthanum, La
Broader	metallic element, metal	Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
Spanish	lantano, número atómico 57
Catalan	lantà, lantani, número atòmic 57

HyperDic: atomic_number_57