a cell with a thick, often lignified, cell wall that is shorter than a fiber cell and dies soon after the thickening of its cell wall.
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http://en.wikipedia.org/wiki/Glossary_of_botanical_terms
Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. The presence of numerous sclereids form the cores of apples and produce the gritty texture of pears. Although sclereids are variable in shape, the cells are generally isodiametric, p...
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http://en.wikipedia.org/wiki/Sclereid
(from the article `sclerenchyma`) ...long, tapering ends interlock, thus providing maximum support to a plant. They can be found almost anywhere in the plant body, including the stem, ... The two principal types of sclerenchyma cells are sclereids and fibres. Sclereids vary in shape and size and may be branched. They are common in seed ...
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http://www.britannica.com/eb/a-z/s/48
Type of sclerenchyma cell that differs from the fibre cell by not being greatly elongated. Often occurs singly (an idioblast) or in small groups, giving rise to a gritty texture in, for instance, the pear fruit, where it is known as a stone cell. May also occur in layers, for example in hard seed coats. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
Type of sclerenchyma cell that differs from the fibre cell by not being greatly elongated. Often occurs singly (an idioblast) or in small groups, giving rise to a gritty texture in, for instance, the pear fruit, where it is known as a 'stone cell'. May also occur in layers, eg. in hard seed coats.
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http://www.encyclo.co.uk/visitor-contributions.php
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