graywater
/ˈɡreɪˌwɔtər/
noun
- Wastewater from household uses like washing dishes, laundry, or bathing, that does not contain sewage and can be reused for irrigation.
- We collect graywater from the shower to water our garden.
- Many homes use a graywater system to reduce water waste.
- Graywater should not be used on edible plants unless treated properly.