Search Result for "atomic_number_18":
Wordnet 3.0

NOUN (1)

1. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere;
[syn: argon, Ar, atomic number 18]



WordNet (r) 3.0 (2006):

atomic number 18
    n 1: a colorless and odorless inert gas; one of the six inert
         gases; comprises approximately 1% of the earth's atmosphere
         [syn: argon, Ar, atomic number 18]