Bot. in descriptions of plant stems, stalks, seeds, etc.: (a) Having longitudinal ridges or palpable edges, ribbed; (b) in compound adjectives in which the specified number of such edges implies a……

Bot. of stems, etc.: four-edged, square in cross-section, quadrate [cp. four-square adj.]. …

Bot. Of a plant's stalk: having perceptible longitudinal ridges or edges, ridged. …

Bot. of seeds, seed-pods, etc.: three-cornered, triangular in cross-section, triquetrous [cp. thre-square adj.]. …

Bot. of a plant's stem: somewhat bent or crooked. …