a. Pertaining to, or written in, hemistichs; also, by, or according to, hemistichs; as, a hemistichal division of a verse. [ 1913 Webster ]

‖PROP. n. pl. [ NL., from Gr. pe`talon a leaf + sti`chos a row. ] (Zool.) An order of Echini, including the irregular sea urchins, as the spatangoids. See Spatangoid. [ 1913 Webster ]