Hrachia Acharian (Armenian: Հրաչեայ Աճառեան, reformed spelling: Հրաչյա Աճառյան Armenian pronunciation: [hɾɑtʃʰjɑ ɑtʃɑrjɑn]; 8 March 1876 – 16 April 1953) was an Armenian linguist, lexicographer, etymologist, and philologist. An Istanbul Armenian, Acharian studied at local Armenian schools and at the Sorbonne, under Antoine Meillet, and the University of Strasbourg, under Heinrich Hübschmann. He then taught in various Armenian communities in the Russian Empire and Iran before settling in the Armenian Soviet Socialist Republic in 1923, working at Yerevan State University until his death.