<p><strong>Noun</strong></p><ul><li>A rib or riblike part.</li><li>The midrib of a leaf in mosses.</li><li>A ridge.</li><li>A vein, usually marginal, in the anterior portion of the wing of certain insects.</li><li>The anterior edge or border of the wing of certain insects.</li><li>A grain sorghum, <em>Sorghum bicolor caffrorum</em>, having stout, short-jointed, leafy stalks, introduced into the United States from southern Africa.</li></ul>