[f. mod.L. Spinacia spinach.] Belonging to the spinach family.
1822. Loudon, Encycl. Gard., 711. Spinaceous Plants. The excellence of this class consisting in the succulency of the leaves [etc.]. Ibid. (1842), Suburban Hort., 659. Substitutes for spinaceous esculents are to be found in chenopodiaceous plants generally.