cork (in botany)
cork, protective, waterproof outer covering of the stems and roots of woody plants. Cork is a specialized secondary tissue produced by the cork cambium of the plant (see meristem, bark). The regularly arranged walls of cork cells are impregnated with a waxy material, called suberin, that is almost impermeable to water or gases. Commercial cork, obtained from the cork oak, is buoyant in water because of the presence of trapped air in the cavities of the waterproof dead cells. It is also resilient, light, chemically inert, and, because of the suction cup action of the cut cells, adhesive. These qualities make cork valuable for bottle stoppers, insulating materials, linoleum, and many household and industrial items.
"cork (in botany)." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (April 21, 2019). https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/cork-botany
"cork (in botany)." The Columbia Encyclopedia, 6th ed.. . Retrieved April 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/cork-botany
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Hence as vb. †furnish with a cork sole XVI; stop with a cork XVII.
"cork." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (April 21, 2019). https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cork-1
"cork." The Concise Oxford Dictionary of English Etymology. . Retrieved April 21, 2019 from Encyclopedia.com: https://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/cork-1