A sweet, saccharine substance, found on the leaves of trees and other plants in small drops, like dew. Two substances have been called by this name; one exuded from the plants, and the other secreted by certain insects, esp. aphids.
- A sweet sticky substance excreted by various insects, especially aphids, on the leaves of plants.
- A sweet exudate similar to honeydew on the leaves of plants.
- A honeydew melon.