Méi Biāo 梅彪 was a mid-Táng Daoist alchemist, author of KR5c0299 Shí yào ěr yǎ 石藥爾雅 — a systematic alchemical lexicon of mineral drugs (shí yào 石藥), dated by its preface to 806 (Yuán hé 1). The work catalogues alternate names (yì míng 異名) for minerals used in elixir-making, serving as a síngua non for decoding the secretive nomenclature of the alchemical corpus.