The delta point is
|“||the part of a fingerprint pattern that looks similar to the Greek letter delta. Technically, it is the point on a friction ridge at or nearest to the point of divergence of two type lines, and located at or directly in front of the point of divergence.||”|
- ↑ Biometrics Identity Management Agency, Biometrics Glossary, at 20 (Ver. 5) (Oct. 2010) (full-text).