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breakup
breakup value
breakwater
bream (1)
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breast
breast augmentation
breast-feed
breastbone
breastplate
breaststroke
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breastbone

breast·bone [ brést bn ] (plural breast·bones)


noun 
Definition:
 
long bone in center of chest: a long bone running down the front of the chest, flat in many animals but ridged in most birds. In humans, the top seven pairs of ribs are connected to it.


Regional History

See pulley bone.

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