long-chain

American  

[lawng-cheyn, long-] / ˈlɔŋˌtʃeɪn, ˈlɒŋ- /

adjective

Chemistry.

1. pertaining to molecules composed of long chains of atoms, or polymers composed of long chains of monomers.

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long-chain British  

adjective

1. chem having a relatively long chain of atoms in the molecule

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Etymology

Origin of long-chain

First recorded in 1925–30

Example Sentences

The study found no increase in harmful liver fats known as long-chain ceramides, while levels of beneficial very long-chain ceramides rose.

From Science Daily • Feb. 8, 2026

Though amber is chemically different from most plastics, it is also made of complex long-chain organic molecules that can survive for millions of years when buried in the ground.

From Slate • Apr. 27, 2024

Short-chain PFAS, some of which can be toxic at low doses, are becoming more prevalent as many manufacturers use them as a replacement for the long-chain compounds.

From Washington Post • Apr. 16, 2023

At the time, the thinking was that short-chain chemicals were safer; testing and scientific study into long-chain chemicals was more extensive.

From Seattle Times • Feb. 23, 2023

But even in ordering these building blocks into long-chain molecules, there has been substantial laboratory progress.

From "Cosmos" by Carl Sagan