automower means an automatic lawnmower, especially (in later use) one that is robotic. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Etymology
From auto- + mower.
noun
- An automatic lawnmower, especially (in later use) one that is robotic.“The McCormick Harvesting Machine Company[…]had on exhibition at its building at Parc Vincennes an automower[…]It cut the grass with the greatest of ease[…]”