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subantarctic
subapical
subapostolic
subaqua
subaquatic
subaqueous
subarachnoid
subarctic
subatomic
subaudition
subaxillary
subbase
subbituminous
subcaliber
subcartilaginous
subcelestial
subcellular
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subatomic
sub·a·tom·ic [ sùbbə tómmik ]


adjective 
Definition:
 
1. less than atom: occurring as part of an atom, or smaller than an atom
a subatomic particle
2. on smaller-than-atom scale: on a scale smaller than the atom, or involving phenomena at this level
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