noun, Plant Pathology.
a disease, especially of cereals and other grasses, characterized by rust-colored pustules of spores on the affected leaf blades and sheaths and caused by any of several rust fungi.
[leef] /lif/ noun, plural leaves [leevz] /livz/ (Show IPA) 1. one of the expanded, usually green organs borne by the stem of a plant. 2. any similar or corresponding lateral outgrowth of a stem. 3. a petal: a rose leaf. 4. leaves collectively; foliage. 5. Bibliography. a unit generally comprising two printed, blank, or illustrated […]
noun, Plant Pathology. 1. a bacterial disease of sugarcane, characterized by irregular, bleached streaks on the leaves and defoliation and caused especially by Bacterium albilineans.
noun, Botany. 1. the mark left on a stem or twig after a leaf falls. leaf scar The mark left on a stem after a leaf falls. Leaf scars can be used to identify tree species in winter or from specimens of their twigs.
- Leaf sheath
noun 1. (botany) the basal part of a grass leaf that encircles the stem