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| a chattering or flighty, light-headed person. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| in vitro fertilization | |
| —n | |
| IVF a technique enabling some women who are unable to conceive to bear children. Egg cells removed from a woman's ovary are fertilized by sperm in vitro; some of the resulting fertilized egg cells are incubated until the blastocyst stage, which are then implanted into her uterus | |
in vitro fertilization n.
Fertilization of an egg outside the body of a female by the addition of sperm, as a means of producing a zygote.
| in vitro fertilization
Fertilization of an egg outside the body of a female by the addition of sperm, as a means of producing a zygote. |