Top Definition
of or relating to a penis consisting of a single atom;
"Phill and Matt have monatomic knobs"
by mikkachops September 20, 2007
7 Words related to monatomic
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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