一种加热时柔软流动而冷却即凝固的富含虫胶和松脂的树脂品，用于给信件、电池或罐子封口。
A resinous preparation of shellac and turpentine that is soft and fluid when heated but solidifies upon cooling, used to seal letters, batteries, or jars.
紫胶，虫胶由紫胶虫分泌的沉积于树上的树脂分泌物，用于制造虫胶清漆。
A resinous secretion of the lac insect deposited on trees and used in making shellac.
虫胶；天然树胶、树脂、树胶脂及油树脂(例如，香树脂)。
Lac; natural gums, resins, gum-resins and oleoresins (for example, balsams).
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