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collision
collision course
collision damage waiver
collision zone
collo-
collocate
collocation
collodion
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colloid
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collider
collider [ kə ldər ] (plural colliders) or colliding-beam machine [ kə lding bm mə sheen ] (plural colliding-beam machines)


noun 
Definition:
 
particle accelerator: a particle accelerator in which two oppositely moving particle beams are made to collide. This allows the particles to use more of their energy to create new particles than when they collide with a fixed target.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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