Noun | 1. | ![]() interstitial tissue - tissue between the cells of a structure or part in plant or animal fibrous tissue - tissue consisting of or containing fibers in both animals and plants cortex - the tissue forming the outer layer of an organ or structure in plant or animal medulla - the inner part of an organ or structure in plant or animal perisperm - the nutritive tissue outside the sac containing the embryo in some seeds stroma - the dense colorless framework of a chloroplast stroma - a mass of fungal tissue that has spore-bearing structures embedded in it or on it plant part, plant structure - any part of a plant or fungus pith - soft spongelike central cylinder of the stems of most flowering plants parenchyma - the primary tissue of higher plants composed of thin-walled cells that remain capable of cell division even when mature; constitutes the greater part of leaves, roots, the pulp of fruits, and the pith of stems lignum - woody tissue vascular tissue - tissue that conducts water and nutrients through the plant body in higher plants pseudophloem - false phloem gall - abnormal swelling of plant tissue caused by insects or microorganisms or injury meristem - undifferentiated tissue from which new cells are formed, as at the tip of a stem or root |