|Compare branched chain|
|a. an open chain of atoms in a molecule with no attached side chains|
|b. (as modifier): a straight-chain hydrocarbon|
|a stew of meat, vegetables, potatoes, etc.|
|a gadget; dingus; thingumbob.|
An arrangement of atoms of the same type that forms an unbranched open chain. Propane is a straight-chain compound with a chain of three carbon atoms.