green-fly—any of numerous insects (superfamily Aphidoidea) that suck the juices of plants thereby causing withering:
- If green-fly makes its appearance, fumigation with tobacco smoke is the only remedy.
greenbottle fly—any of several brilliant green-bodied flies of the family Calliphoridae:
- The larva of a greenbottle fly of the genus Lucilia is used as a live bait in some fresh-water fishing.