Definition of "infusorian" []

• Any member of the infusoria (noun)

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• "Here then was the cup or calyx of a definite vorticellan form changing into (?) an absolutely different infusorian, viz.,"
• "The difference between man and the infusorian is only that in the former the cells which originate from the double cell (the fertilized ovum) remain together and become differentiated one from another, while in the latter the cells are usually scattered but remain alike in appearance, etc."
• "At the end of each branch is situated an infusorian (vorticella), and the whole colony represents in itself the genealogical family tree."