va·lo·ni·a (v -l  n -, -lny)n. The dried acorn cups of an oak tree (Quercus aegilops) of the eastern Mediterranean, used chiefly in tanning and dyeing. [Italian vallonia, from Modern Greek balania, pl. of balani, acorn, from Greek balanos.] |
valonia [vəˈləʊnɪə]
n
(Life Sciences & Allied Applications / Plants) the acorn cups and unripe acorns of the Eurasian oak Quercus aegilops, used in tanning, dyeing, and making ink
[from Italian vallonia, ultimately from Greek balanos acorn]
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