protopectin

[ proh-tuh-pek-tin ]
/ ˌproʊ təˈpɛk tɪn /

noun Biochemistry.

any of the class of water-insoluble pectic substances that are found in the rind of citrus fruits or in apple peels and that are hydrolyzed to pectin or pectic acid.
Also called pectinogen, pectose.

Origin of protopectin

First recorded in 1905–10; proto- + pectin