Top definition
of or relating to a penis consisting of a single atom;
"Phill and Matt have monatomic knobs"
by mikkachops September 20, 2007
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2
Phrase used to describe an element whose atoms are not connected to each other in its pure (unreacted) state.
Helium, Xenon, Sodium...take your pick
by Shawn B. September 29, 2003
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