noun, Pharmacology.
an active ingredient in many antacid preparations that causes small mucus-entrapped air bubbles in the intestines to coalesce into larger bubbles that are more easily passed.

simethicone si·meth·i·cone (sĭ-měth’ĭ-kōn’)
A mixture of dimethyl polysiloxanes and silica gel that is used as an antiflatulent.


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