TZa piece of metal that is heated and used for burning marks on cattle or sheep, to show who they belong to 〔在牲畜身上烙印用的〕烙铁
Examples from the Corpus
branding iron• Doubtless he was quite disappointed when in 1811 the use of the branding iron was discontinued.• My flocks of thought have dispersed and become lost for I have not marked them with the branding iron of the images.