sclereid

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sclereid

(sklĕr′ē-ĭd)
n.
A thick-walled lignified sclerenchyma cell. Sclereids are variable in shape and are shorter than fibers.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

sclereid

a type of SCLERENCHYMA cell of higher plants, which is roughly spherical in shape with a thick wall that can be smooth or spiky and is always heavily impregnated with LIGNIN. Sclereids occur in the flesh of succulent fruits such as pears, and are common in the shells of nuts.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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