bratwurst vs. sausage

a sausage made of pork, spices, and herbs, sometimes without a casing, usually served sautéed or broiled.

minced pork, beef, or other meats, often combined, together with various added ingredients and seasonings, usually stuffed into a prepared intestine or other casing and often made in links.

Aeronautics. a sausage-shaped observation balloon, formerly used in warfare.