bot

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The parasitic larva of a botfly.
2. n. A disease of mammals, especially cattle and horses, caused by infestation of the stomach or intestines with botfly larvae.
3. n. A software program that imitates the behavior of a human, as by querying search engines or participating in chatroom or IRC discussions.

Century Dictionary and Cyclopedia

1. n. A name given to the larva or maggot of several species of gadfly when found in the intestines of horses, under the hides of oxen, in the nostrils of sheep, etc. The bots which infest horses are the larvæ of the Gasterophilus equi, or gadfly, which deposits its eggs on the tips of the hairs, generally of the fore legs and mane, whence they are taken into the mouth and swallowed. They remain in great numbers in the stomach for several months, and are expelled in the excrement and become pupæ, which in five weeks become perfect insects, woolly, and not quite half an inch long. See cut under bot-fly.
2. n. The Anglo-Saxon form (bōt) of boot, a fine, etc.: only in historical use.
3. n. An obsolete preterit of bite.
4. A Middle English form of but.
5. n. The English Board of Trade unit of electrical supply.
6. n. A dialectal form of bat in various senses. Also spelled bott.
7. n. In founding, a clay plug used to close a hole against molten iron.

Wiktionary

1. v. UK, slang To bugger
2. v. Australia, informal To ask for and be given something with the direct intention of exploiting that thing’s usefulness, almost exclusively with cigarettes.
3. n. The larva of a bot fly, which infests the skin of various mammals, producing warbles, or the nasal passage of sheep, or the stomach of horses.
4. n. science fiction, informal A physical robot.
5. n. computing A piece of software designed to complete a minor but repetitive task automatically or on command, especially when operating with the appearance of a (human) user profile or account.
6. n. video games A computer controlled character in a multiplayer video game, such as a first-person shooter.

GNU Webster's 1913

1. n. (Zoöl.) See bots.

WordNet 3.0

1. n. botfly larva; typically develops inside the body of a horse or sheep or human