Definition of Lanthanum in English :

Define Lanthanum in English

Lanthanum meaning in English

Meaning of Lanthanum in English

Pronunciation of Lanthanum in English

Lanthanum pronunciation in English

Pronounce Lanthanum in English

Lanthanum

see synonyms of lanthanum

Noun

1. atomic number 57, la, lanthanum

a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth

WordNet Lexical Database for English. Princeton University. 2010.


Lanthanum

see synonyms of lanthanum
noun
a silvery-white ductile metallic element of the lanthanide series, occurring principally in bastnaesite and monazite: used in pyrophoric alloys, electronic devices, and in glass manufacture. Symbol: La; atomic no: 57; atomic wt: 138.9055; valency: 3; relative density: 6.145; melting pt: 918°C; boiling pt: 3464°C

Collins English Dictionary. Copyright © HarperCollins Publishers


Lanthanum

see synonyms of lanthanum
noun
a soft, malleable, silvery chemical element, one of the rare-earth elements and the first member of the lanthanide series: symbol, La; at. no., 57
see the periodic table of elements in the Reference Supplement

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.


Lanthanum

see synonyms of lanthanum
n. Symbol La
A soft, silvery-white, malleable, ductile element of the lanthanide series, obtained chiefly from the minerals monazite and bastnaesite and used in glass manufacture and with other rare-earth elements in carbon lights for movie and television studio lighting. Atomic number 57; atomic weight 138.91; melting point 920°C; boiling point 3,464°C; specific gravity 6.145 (at 25°C); valence 2, 3. See Periodic Table.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.