Glossary Term

Phred Quality Score

PCR TermsEN

Definition

A score reported on a logarithmic scale representing the probability that a nucleotide base was incorrectly called by the base caller.

Extended Notes

Source: National Cancer Institute, NCI Thesaurus 26.09d, C228655. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-20. No individual clinical interpretation or human reviewer is asserted.

Also Known As

Phred Quality ScoreQ-Score