A power tool designed to efficiently cut trees by means of a motorized chain with serrated edges, hence the term chainsaw. Chainsaws usually consist of a two-stroke gasoline engine, but with electric power being more commonplace, some chainsaw brands are electric-powered. However, in popular culture, the chainsaw has gained notoriety as a potential weapon or an instrument of torture and/or gruesome murder, most famously in the movies Texas Chainsaw Massacre, Hostel, and Scarface. The chainsaw has also been featured in video games such as Doom 3 and Resident Evil 4, where it has become an icon.
In Resident Evil 4, the player can be gruesomely decapitated by Doctor Salvador or The Bella Sisters, the main chainsaw-wielding enemies of the game.
a)A motor-driven spiked chain. Can range in size from a couple of inches to several metres. The chain moves at a high speed, and with great power. It can do the work of a manual saw in a fifth of the time.