from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The dried acorn cups of an oak tree (Quercus aegilops) of the eastern Mediterranean, used chiefly in tanning and dyeing.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The European evergreen oak, Quercus macrolepis or Quercus aegilops
- n. The dried acorn cups of this tree, that are used to make a black dye, used in tanning
from the GNU version of the Collaborative International Dictionary of English
- n. The acorn cup of two kinds of oak (Quercus macrolepis, and Quercus vallonea) found in Eastern Europe. It contains an abundance of tannin, and is much used by tanners and dyers.
- n. A genus of marine green algæ, in which the whole frond consists of a single oval or cylindrical cell, often an inch in length.
from The Century Dictionary and Cyclopedia
- n. The commercial name for the acorn-cups of the valonia-oak, which are imported into Great Britain in large quantities from Asia Minor and Greece for use in tanning, dyeing, and making ink.
Italian vallonia, from Modern Greek balania, pl. of balani, acorn, from Greek balanos.(American Heritage® Dictionary of the English Language, Fourth Edition)