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antiphase
antiphon
antiphonary
antiphony
antiphospholipid syndrome
antiphrasis
antipode
antipodean
Antipodes
antipodes
antipope
antiprostaglandin
antiproton
antiprotozoal
antipruritic
antipsoriasis
antipsychiatry
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antiparticle

an·ti·par·ti·cle [ àntee prtik'l, àntī prtik'l ] (plural an·ti·par·ti·cles)


noun 
Definition:
 
elementary particle having some opposite properties: an elementary particle with the same mass as its corresponding particle but with opposite values for other properties such as charge. When an antiparticle and its particle interact, mutual annihilation occurs.

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