straight-chain

[ streyt-cheyn ]

noun

, Chemistry.

1. an open chain of atoms, usually carbon, with no side chains attached to it.

straight chain

noun

1. Compare branched chain
   1. an open chain of atoms in a molecule with no attached side chains
   2. ( as modifier )

      a straight-chain hydrocarbon

straight chain

1. 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.

Word History and Origins

Origin of straight-chain¹

First recorded in 1925–30

Example Sentences

His work also led to new methods to convert “straight-chain” hydrocarbons into molecules with branched structures, which resulted in higher octane ratings and cleaner-burning fuel.

From Washington Post

Secondly, nitric acid oxidation opens up these ring structures, completely converting them into straight-chain adipic acid.

From Scientific American

Evidence of their prodigious activity was measured in a depression of nitrates in the water, Hazen says, and a continuous loss of straight-chain oil hydrocarbons known as alkanes—first the shorter ones and then the longer hydrocarbons.

From US News