1. a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals; [syn: lithium, Li, atomic number 3]
WordNet (r) 3.0 (2006):
atomic number 3
n 1: a soft silver-white univalent element of the alkali metal
group; the lightest metal known; occurs in several minerals
[syn: lithium, Li, atomic number 3]