01 n. A composite plant of the genus Lactuca (Lactuca sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, …
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1.
A composite plant of the genus Lactuca (Lactuca sativa), the leaves of which are used as salad. Plants of this genus yield a milky juice, from which lactucarium is obtained. The commonest wild lettuce of the United States is Lactuca Canadensis.(Bot.)
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2.
United States currency; dollar bills; greenbacks.[slang]
Phrases & compounds
Lettuce opium —
See Lactucarium.
Sea lettuce —
certain papery green seaweeds of the genus Ulva.