leaf cast
pathology 1. any untimely shedding of foliage —note leaf cast is in contrast to natural leaf-fall 2. any disease causing untimely shedding of foliage —note most leaf cast is caused by fungi including Lophodermium needle cast and Rhabdocline needle cast —synonym needle cast (in conifers) —see defoliator This definition last updated 07/11/2008