si·meth·i·cone 
(sĭ-mĕthĭ-kōn′)
(sĭ-mĕthĭ-kōn′)n.
A mixture of methyl siloxane polymers and silica gel, used an antiflatulent drug and as an antifoaming agent in cosmetics and industrial applications.
[SI(LICA) + (di)methicone, a silicon polymer (DI- + METH- + (SIL)ICONE).]
- overmedication
- overmuch
- over my dead body
- overnight
- overnight bag
- overnighter
- over (one's) head
- over one's head
- over one's skis
- overoptimism
- overoptimistic
- overoptimistically
- overpass
- overpay
- overpayment
- overpersuade
- overpersuasion
- overplay
- overplus
- overpopulate
- overpopulation
- overpower
- overpowering
- overpoweringly
- overpraise