sieve-plates

sieve cell

noun Botany.
an elongated cell whose walls contain perforations (sieve pores) that are arranged in circumscribed areas (sieve plates) and that afford communication with similar adjacent cells.

Origin:
1870–75

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
sieve cell   (sĭv)  Pronunciation Key 
An elongated, food-conducting cell in phloem characteristic of gymnosperms. Sieve cells have pores through which nutrients flow from cell to cell, but they have no sieve plates like the more specialized sieve-tube elements of angiosperms. Compare sieve-tube element.
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