long-chain
UK[ˈlɒŋ tʃeɪn]US[ˈlɔːŋ tʃeɪn]
adj
consisting of molecules that contain a relatively large number of atoms in a linear or branched arrangement.
Morpheme Breakdown
long
chain
long
extended
chain
series
Etymology
the compound adjective 'long-chain' is a modern scientific term formed by combining two english words of ancient lineage. 'long' originates from proto-germanic langaz, conveying the concept of extended length. 'chain' traces back to latin 'catena', meaning a fetter or series of connected links. in chemistry and biochemistry, these literal meanings were metaphorically applied to describe molecules, particularly hydrocarbons or polymers, characterized by an extended series of connected atoms. thus, the term logically denotes a molecular structure with a lengthy sequence of repeating units.
Analysis
Structure: long (extended) + chain (series)
'long' is from old english 'lang, long', meaning having great linear extent. 'chain' is from old french 'chaeine', from latin 'catena', meaning a connected series of links or rings.
Examples
long-chain fatty acids are important for brain health.
the polymer is composed of long-chain molecules that give it strength.
this detergent is effective because it contains long-chain surfactants.