parasite / parisite / pericyte [ˈpɒrəsait]
parasite – n. – a person or thing that takes exploits another
parisite – n. – a mineral composed of carbonate, fluoride, calcium, cerium and lanthanum {(CeLa)2Ca(CO3)3F2}
pericyte – n. – an adventitious cell of connective tissue about capillaries or other small blood vessels