pectin

詳細解釋：

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：任一種用於凝結各種食物、藥品和化裝品的高分子量且溶於水的膠質碳水化合物，存在於如蘋果、杏和葡萄等成熟的水果中

來源：
French pectine
法文 pectine
from Greek pôktos [coagulated]
源自 希臘語 pôktos [凝結的]
from pôgnunai [to coagulate] * see pag-
源自 pôgnunai [凝結] *參見 pag-

【引伸】
pec.tic 或
pec.tinous
adj.（形容詞）