false negative refers to assessment error in which no pathology is noted, that is, test results are negative when one is actually present.
Other /More definition:
False negative refers to Incorrect result of a medical test or procedure that wrongly shows the lack of a finding; assessment error in which no pathology is noted (that is, test results are negative - a negative test result that occurs in a person who is positive for the virus) when one is actually present.
In test-decision theory, a case in which the test suggests a negative classification, yet the correct classification is positive.