Definition of “port wine stain” - English Dictionary

british dictionary

“port wine stain” in British English

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port wine stainnoun [ C ]

uk /ˌpɔːt ˈwaɪn ˌsteɪn/ us /ˌpɔːrt ˈwaɪn ˌsteɪn/

a dark red birthmark (= mark on the skin that has been there since a person's birth)

(Definition of “port wine stain” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)