|the offspring of a zebra and a donkey.|
|a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.|
in vitro in vi·tro (ĭn vē'trō)
In an artificial environment outside a living organism.
In the laboratory; literally, “in glass” (laboratory experiments are often carried out in glass containers). In vitro conditions are distinguished from conditions that actually apply in nature. (Compare in vivo.)
Note: In vitro appears in the expression in vitro fertilization, a way of producing human embryos in a laboratory.