Sclereid | definition of sclereid by Medical dictionary
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A thick-walled lignified sclerenchyma cell. Sclereids are variable in shape and are shorter than fibers.
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.