# Risser sign

> English word · Proper noun

## Definitions
1. An indirect measure of skeletal maturity, whereby the ossification stage of the iliac apophysis is used to judge the ossification of the spinal vertebrae.

## Etymology
The correlation was first described by Risser in 1958, with a graded classification scheme developed at a later time.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/risser-sign