cork

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cork

(kork),
1. The outer bark of the cork oak, used to make stoppers for some better bottles of wine. 2. A stopper made of cork or any similar substance.
[L. quercus, oak]

cork

a plant tissue made up of cells with thick walls impregnated with SUBERIN. Cork cells are dead when mature, forming an outer layer in stems and roots of woody plants that is impervious to water and air. The cork oak Quercus suber produces very large quantities of cork which can be removed and used commercially