predatory arachnid that usually has silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey
a skillet made of cast iron
a computer program that prowls the internet looking for publicly accessible resources that can be added to a database; the database can then be searched with a search engine
a procession (of wagons or mules or camels) traveling together in single file; "we were part of a caravan of almost a thousand camels"; "they joined the wagon train for safety"