Her love for vintage dresses is a real throwback to her grandmother's era.

throwback 是名词，由动词 throw（投掷）和副词 back（向后）组成，字面意思是"向后扔"。引申为"回归、返祖现象"，在这里特指"对过去事物的怀念或重现"，即"怀旧"。