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sieve tube

noun, Botany
1.
a vertical series of sieve cells in the phloem, specialized for the conduction of food materials.
2.
a single sieve cell.
Origin
1870-1875
1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for sieve tube
  • sieve tube development in strawberry receptacles in relation to fruit set and initial growth.
British Dictionary definitions for sieve tube

sieve tube

noun
1.
(botany) an element of phloem tissue consisting of a longitudinal row of thin-walled elongated cells with perforations in their connecting walls through which food materials pass
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for sieve tube

in flowering plants, elongated living cells (sieve-tube elements) of the phloem, the nuclei of which have fragmented and disappeared and the transverse end walls of which are pierced by sievelike groups of pores (sieve plates). They are the conduits of food (mostly sugar) transport.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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