Etymology · Proto-Indo-European
*gʰredʰ-
2 English words descend from Proto-Indo-European *gʰredʰ-, most common first.
- retrogradeDirected or moving backwards in relation to the normal or previous direction of travel; retreating.
- fibrodysplasia ossificans progressivaA very rare, disabling genetic disorder of the connective tissue in which fibrous tissue (including ligaments, muscles, and tendons) ossifies (“transforms into bone”) when damaged.