1. (noun)vein, nervure any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ Synonyms: vena, venous bloodvessel, nervure, vein, mineralvein
2. (noun)vein, nervure one of the horny ribs that stiffen and support the wing of an insect Synonyms: vena, venous bloodvessel, nervure, vein, mineralvein