Hypertext Webster Gateway: "lithium"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Lithium \Lith"i*um\ (l[i^]th"[i^]*[u^]m), n. [NL., from Gr.
li`qeios of stone, fr. li`qos stone.] (Chem.)
A metallic element of the alkaline group, occurring in
several minerals, as petalite, spodumene, lepidolite,
triphylite, etc., and otherwise widely disseminated, though
in small quantities.
Note: When isolated it is a soft, silver white metal,
tarnishing and oxidizing very rapidly in the air. It is
the lightest solid element known, specific gravity
being 0.59. Symbol Li. Atomic weight 7.0 So called from
having been discovered in a mineral.
From WordNet (r) 1.7 (wn)
lithium
n : a soft silver-white univalent element of the alkali metal
group; the lightest metal known; occurs in several
minerals [syn: {Li}, {atomic number 3}]
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