Green vegetables or leafy plants, especially when used as food, or green plant matter in general.
English compound from 'green' plus 'stuff' (meaning 'material' or 'things'), dating to the 18th century as a colloquial term for vegetables and fresh greens.
Farmers and cooks have used 'greenstuff' as shorthand for vegetables for centuries—it's wonderfully vague, which is perfect because it can mean anything from kale to lettuce to fresh herbs!
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