名詞 pectin:

1. any of various water-soluble colloidal carbohydrates that occur in ripe fruit and vegetables; used in making fruit jellies and jams

pec.tin

n.（名詞）
Any of a group of water-soluble colloidal carbohydrates of high molecular weight found in ripe fruits, such as apples, plums, and grapefruit, and used to jell various foods, drugs, and cosmetics.
果膠：任一種用于凝結(jié)各種食物、藥品和化裝品的高分子量且溶于水的膠質(zhì)碳水化合物，存在于如蘋果、杏和葡萄等成熟的水果中

來源：
French pectine
法語 pectine
from Greek pôktos [coagulated]
源自 希臘語 pôktos [凝結(jié)的]
from pôgnunai [to coagulate] * see pag-
源自 pôgnunai [凝結(jié)] *參見 pag-

【引伸】
pec.tic 或
pec.tinous
adj.（形容詞）