nematosomeEtymologyFrom nemato- + -some.nounA multicellular motile body found in the gastrovascular cavity of the sea anemone NematostellaA particular organelle found in certain neurons, consisting of threadlike structures.“A distinctive cytoplasmic inclusion consisting of a convoluted network of electron-opaque strands embedded in a less dense matrix was identified in the neurons, but not in the supporting cells, of rat sympathetic ganglia . This ball-like structure, designated "nematosome," measures - 0 .9 μ and lacks a limiting membrane.”