Ultrasound
Visualization of structures in the body by recording the reflections of sound waves directed into tissues. May be used during surgery.
Undifferentiated
An immature, embryonic, or primitive cell. It has a nonspecific appearance with multiple nonspecific activities and functions poorly. See differentiate, dedifferentiate.
Uterus
The hollow muscular organ in which the impregnated ovum (egg) is developed into an infant.
