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| a fool or simpleton; ninny. |
| the offspring of a zebra and a donkey. |
in vivo in vi·vo (vē'vō)
adj.
Within a living organism.
| in vivo (ĭn vē'vō) Pronunciation Key
Inside a living organism. Compare in vitro. |
In nature; literally, “in life.” In vivo conditions are distinguished from those that might exist only in a laboratory. (Compare in vitro.)