Definition of birthweight noun from the Oxford Advanced Learner's Dictionary

 

birthweight

 noun
noun
BrE BrE//ˈbɜːθweɪt//
 
; NAmE NAmE//ˈbɜːrθweɪt//
 
[uncountable, countable] Birth
 
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the recorded weight of a baby when it is born See related entries: Birth
See the Oxford Advanced American Dictionary entry: birthweight