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periodic system

 - 1 dictionary result

pe⋅ri⋅od⋅ic sys⋅tem

[peer-ee-od-ik, peer-]
–noun Chemistry.
a system of classification of the elements based on the periodic law.

Origin:
1870–75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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