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Definition of port wine stain noun from the Oxford Advanced Learner's Dictionary

port wine stain

noun
 
/ˌpɔːt ˈwaɪn steɪn/
 
/ˌpɔːrt ˈwaɪn steɪn/
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  1. a large, dark red birthmark (= a mark that somebody is born with on their skin)
    • a port wine stain, present at birth
    Topics Appearancec2
See port wine stain in the Oxford Advanced American Dictionary
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noun
 
 
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