butterleaf means A kind of lettuce with a delicate buttery flavour. Lexicurio rates it Sui generis — a strength score of 94 out of 100.
Etymology
From butter + leaf.
noun
- A kind of lettuce with a delicate buttery flavour.“This will not be a problem if you use a butterleaf lettuce like Bibb, or possibly the inner leaves of romaine or cabbage (it depends on the particular head).”