sieve tube

noun

: a tube consisting of an end-to-end series of thin-walled living plant cells characteristic of the phloem and held to function chiefly in translocation of organic solutes

Word History

First Known Use

1875, in the meaning defined above

Kids Definition

sieve tube

noun

: a tube that is composed of an end-to-end series of thin-walled living cells, transports food substances in plants, and is found in the phloem