Friction Ridge
Definition
Raised epidermal ridge on the palmar surface of fingers, palms and soles, formed during foetal life from the underlying dermal papillae. The pattern is what gets recorded as a fingerprint.
Related terms
- ACE-V
- Analysis, Comparison, Evaluation, Verification: the four-stage method for latent print examination used by accredited forensic fingerprint laboratories. Analysis examines the latent in...
- Adermatoglyphia
- Rare genetic disorder, sometimes called immigration delay disease, in which a person is born without friction ridges. The standard counter-example to the...
- Core
- The approximate centre of a fingerprint pattern. In a loop, it is identified as the innermost recurving ridge's peak or the tip...
- Delta
- Triangular ridge formation at the point where parallel ridge flows diverge. Arches have 0 deltas, loops have 1, whorls have 2 or...
- Dermal Papillae
- Peg-like projections of the dermis into the epidermis. Their geometry sets the ridge pattern in stone before birth. Damage limited to the...
- Henry Classification
- Numeric filing system built at the Calcutta Fingerprint Bureau in 1897. Assigns a numerator and denominator from whorls on even and odd...
- Minutiae (Galton Points)
- Local ridge features used for individual identification. The classical set is ridge ending, bifurcation, dot, island or lake, bridge, hook or spur,...
Explained in
- Fingerprints: History, Characteristics, Types and ClassificationRaised epidermal ridge on the palmar surface of fingers, palms and soles, formed during foetal life from the underlying dermal papillae. The pattern is what ge...