Definition of abnormal adjective from the Oxford Advanced Learner's Dictionary. different from what is usual or expected, especially in a way that worries somebody or is harmful or not wanted. They thought his behaviour was abnormal. The ship was blown off course by abnormal weather conditions.
Labroots: Scientists Found an Estrogen Receptor that Helps Abnormal Tissue Hide from the Immune System
It is completely normal for uterine tissue to grow inside the uterus, but when it is found growing outside the uterus or on the ovaries and fallopian tubes, a condition called endometriosis develops.
Scientists Found an Estrogen Receptor that Helps Abnormal Tissue Hide from the Immune System
News Medical: New ultrasound method can measure a key indicator of abnormal tissue and disease
New ultrasound method can measure a key indicator of abnormal tissue and disease