phloem
Concise Oxford English Dictionary © 2008 Oxford University Press:
phloem /ˈfləʊɛm/
▶noun Botany the vascular tissue in plants which conducts sugars and other metabolic products downwards from the leaves.
– origin C19: from Gk phloos ‘bark’ + the suffix -ēma.
'phloem' also found in these Oxford entries:

