A person who derives profit from others in a parasitic fashion.
The aft edge of a triangular sail.
An aquatic blood-sucking annelid of class Hirudinea, especially Hirudo medicinalis.
A healer.
The vertical edge of a square sail.
To drain (resources) without giving back.
To apply a leech medicinally, so that it sucks blood from the patient.
A nonreproductive social insect, such as ant, bee, termite, or wasp.
A person who performs labor for a living, especially manual labor.
A female ant, bee, termite or wasp.
A thread performing one instance of a particular task within a program.