Noun
1. It refers to the angle between the base of the nail and the nail itself. In healthy individuals, this angle equals to or is less than 165°. (knowyourbody.net)
2. Sagittal-plane angle subtended between dorsal aspect of proximal nail plate and dorsal skin of terminal phalanx; normally ∼160°, but >180° in digital clubbing. (Illustrated Dictionary of Podiatry and Foot Science by Jean Mooney)
3. Lovibond’s angle is the angle between the base of the nail plate and the adjacent skin on the end of the finger. Normally, this angle is less than 165°. If it is 180° or more, there will be a positive Schamroth’s window test. This is a sign of clubbing. (wikipedia.org)
Syn: Lovibond profile sign