pegasse means peat; dark, spongy, acidic, soil of decomposed vegetation (peat), especially in Guyana. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
noun
- Peat; dark, spongy, acidic, soil of decomposed vegetation (peat), especially in Guyana.“The swampland is an extensive pegasse swamp, which is rich in organic matter and intensely acidic.”