Your request was paramecuim which is probably a typo from paramecium.
paramecuim -
Traditional English :: paramecium
paramecuim - n. (also paramoecium) any freshwater protozoan of the genus Paramecium, of a characteristic slipper-like shape covered with cilia. [mod.L f. Gk paramekes oval (as PARA-(1), mekos length)]