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lanthanum (n.)

metallic rare earth element, 1841, coined in Modern Latin by Swedish chemist and mineralogist Carl Gustav Mosander (1797-1858), who discovered it in 1839, from Greek lanthanein "to lie hidden, escape notice," from PIE root *ladh- "to be hidden" (see latent). So called because the element was "concealed" in the earth from which he extracted it.

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Definitions of lanthanum from WordNet

lanthanum (n.)
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth;
Synonyms: La / atomic number "
From wordnet.princeton.edu

Dictionary entries near lanthanum

lank

lanky

lanolin

lant

lantern

lanthanum

lanyard

Lao

Laocoon

Laodicean

Laos