1. a small vein, especially in a leaf or insect wing
Usage: biology

Examples

• The botanist examined the delicate veinules in the maple leaf under a microscope.
• Each veinule carries nutrients to different parts of the leaf tissue.
• The insect’s wing showed a complex pattern of veinules.
• Damage to the veinules can affect the leaf’s ability to photosynthesize.
• The researcher traced the path of each veinule from the main vein to the leaf margin.