Short version: Creative subversion of the omnipresent trope that "higher is better" (eg. "higher quality", "higher rank", "higher calling", etc. etc.). Most common in constructed worlds & languages, and especially among nonhumans.
- Discworld's dwarfs & Tales Of Mu's dark elves, for whom lower is better.
- The Dispossessed by Ursula K Leguin: in the Con Lang Pravic, the term "more central" is used instead.
Hello, Unknown Troper. You'll need to get known to lend a hand here.