Definition of pectin noun from the Oxford Advanced Learner's Dictionary

 

pectin

 noun
noun
BrE BrE//ˈpektɪn//
 
; NAmE NAmE//ˈpektɪn//
 
[uncountable](chemistry)
 
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a substance similar to sugar that forms in fruit that is ready to eat, and is used to make jam/jelly firm as it is cooked Word Origin mid 19th cent.: from Greek pektos ‘congealed’ (from pēgnuein ‘make solid’) + -in.
See the Oxford Advanced American Dictionary entry: pectin