
1) Australian English term 2) Lake of Australia
Found on
https://www.crosswordclues.com/clue/gilgai

A gilgai is a small, ephemeral lake formed from a depression in the soil surface in expanding clay soils. Additionally, the term `gilgai` is used to refer to the overall micro-relief in such areas, consisting of mounds and depressions, not just the lakes themselves. The name comes from the Australian Aboriginal word meaning small water hole. The.....
Found on
http://en.wikipedia.org/wiki/Gilgai

a small gully or ditch. · a small pond or pool of water.
Found on
https://www.infoplease.com/dictionary/gilgai
No exact match found.