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atonality
atone
atonement
atonic
atony
atop
atopic
-ator
atorvastatin
ATP
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atracurium besilate
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atomicity
at·o·mic·i·ty [ àttə míssətee ]


noun 
Definition:
 
1. atomic composition: the number of atoms in a molecule of a chemical element
2. atomic nature: the state of being composed of atoms
3. chemistry 
Same as  valence (sense 1)

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