nervule

Noun

nervule (plural nervules)

1. A minor, nonsupporting vein in a leaf of a plant; a branch vein of a nervure (supporting vein) or of another nervule.
   • D. reticulata (Blum l.c.) leaves 3-nerved, besides the 2 marginal nervules, ovate-oblong, acuminated, rounded at the base, or somewhat cordate, reticulated beneath and covered with ochraceous dots; panicles terminal; calyx almost quite entire; anthers fixed by the back, furnished with somewhat...1832, Geoge Don, A General System of Gardening and Botany, volume 2, page 783
2. A minor vein in a wing of an insect.
   • A close examination of the wing will always show a partially atrophied disco-cellular, connecting these nervules of the discoidal with either the subcostal or the median nervures, even when one of them has been described as quite free.1845, Edward Doubleday, “Remarks on the Genus Argynnis”, in Transactions of the Linnean Society, volume 19, page 481
   • The origin of the first and second median nervules corresponds to that of the two superior subcostal nervules; and the nervule closing the cell unites with the apical portion of the median nervule at a right angle.1875, S. H. Scudder, “On the Structure and Transformations of Eumæus Atala”, in Memoirs of the Boston Society of Natural History, Volume 2, Part 4, Number 2, page 415