CYST

noun see: wheeze Date: circa 1720 a closed sac having a distinct membrane and developing abnormally in a cavity or structure of the body, a body resembling a ~: as, a resting spore of many algae, a gas-filled vesicle (as of a rockweed or bladderwort), a capsule formed about a minute organism going into a resting or spore stage, a resistant cover about a parasite produced by the parasite or the host