I'sa-tĭs, n.
n. [Gr. ἰσάτις, a plant producing a dark dye, woad.] (Bot.) A genus of plants, some species of which, especially the I. tinctoria, yield a blue dye similar to indigo; woad. Baird.
n. [Gr. ἰσάτις, a plant producing a dark dye, woad.] (Bot.) A genus of plants, some species of which, especially the I. tinctoria, yield a blue dye similar to indigo; woad. Baird.