Aleppo gall
Concise Oxford English Dictionary © 2008 Oxford University Press:
Aleppo gall
▶noun a hard nut-like gall, a source of gallic acid and tannin, that forms on the valonia oak (formerly known as the Aleppo oak).
– origin from the name of Aleppo in Syria.
'Aleppo gall' also found in these Oxford entries:

