Fraction of deoxyribonucleic acid (DNA) having fragmented DNA.
Example: Results of sperm DNA damage are generally reported as the percentage of sperm having fragmented DNA, what is called the sperm DNA fragmentation index.
Source:
PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1145 (https://doi.org/10.1515/pac-2016-1120)