- A perennial aroid plant (Amorphophallus konjac) of East and Southeast Asia having a single large compound leaf, a purple or dark red spathe, and starchy corms.
- The edible corm of this plant or the starch derived from it, sometimes used as a dietary supplement. Also called In both senses also called devil's tongue . Also called konnyaku .
Origin of konjacUltimately from Japanese konnyaku from Early Middle Chinese ku&schwabreve;' &jnlig;&istroke;ak ku&schwabreve;' betel leaf ( also the source of Mandarin j&ucaron; ) &jnlig;&istroke;ak rush used to make mats ( also the source of Mandarin ruò )