Webster's English Dictionary

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phloem

phlo.em \'flo--.em\ n [G, fr. Gk phloios, phloos bark; akin to Gk phallos 
   penis -] more at BLOW : a complex tissue in the vascular system of higher 
   plants consisting main ly of sieve tubes and elongated parenchyma cells 
   usu. with fibers and functioning in translocation and in support and 
   storage