How about a MOLECULAR sieve?
The Big Bang Theory Season 2, Episode 18
Okay, this cereal
has lost all its MOLECULAR integrity.
The Big Bang Theory Season 1, Episode 7
...because we were attending a symposium
on MOLECULAR positronium?
The Big Bang Theory Season 1, Episode 10
...for that dense MOLECULAR cloud
of Aramis to dissipate.
The Big Bang Theory Season 1, Episode 3
Don't rush it. We may be dealing
with befoulment on a MOLECULAR level.
The Big Bang Theory Season 6, Episode 9