hemlock may refer to: *Hemlock, several poisonous plants in the Apiaceae family (formerly Umbelliferae): **Hemlock (Conium), two species, one formerly used as a method of execution **Water Hemlock (Cicuta) **Hemlock water dropwort (Oenanthe crocata) *Hemlock (Tsuga), a genus of coniferous trees *Hemlock, A High-performance graphics card code-name.