valonia

va·lo·ni·a

V0015000 (və-lō′nē-ə, -lōn′yə) or val·lo·ne·a (-nē-ə)n. The dried acorn cups of an oak tree (Quercus macrolepis) of the eastern Mediterranean, used chiefly in tanning and dyeing.

[Italian vallonea, vallonia, from Modern Greek balánia, pl. of baláni, variant of beláni, acorn, from Greek balanos.]

valonia

(vəˈləʊnɪə) n (Plants) the acorn cups and unripe acorns of the Eurasian oak Quercus aegilops, used in tanning, dyeing, and making ink[C18: from Italian vallonia, ultimately from Greek balanos acorn]

va•lo•ni•a

(vəˈloʊ ni ə)

n.pl. acorn cups of an Old World oak, Quercus macrolepis (or Q. aegilops), used in tanning. [1715–25; < Italian]

Valonia

the acorn cup (calyx) of several species of oak (Quercus vallonea from Asia Minor and Q. macrolepis from Italy and Greece). Valonia is 35-40 percent tanning substances, or tannins, which are used to tan and strengthen sole leather. Tannins are extracted from valonia by water at a temperature of 50-60° C. (They decompose at higher temperatures.) Valonia is usually used along with acorns; there is 29 percent tannin in the mixture. In the USSR the Q. vallonea and Q. macrolepis can be grown in western Transcaucasia and southern Crimea.

单词	valonia
释义	valonia va·lo·ni·a V0015000 (və-lō′nē-ə, -lōn′yə) or val·lo·ne·a (-nē-ə)n. The dried acorn cups of an oak tree (Quercus macrolepis) of the eastern Mediterranean, used chiefly in tanning and dyeing. [Italian vallonea, vallonia, from Modern Greek balánia, pl. of baláni, variant of beláni, acorn, from Greek balanos.] valonia (vəˈləʊnɪə) n (Plants) the acorn cups and unripe acorns of the Eurasian oak Quercus aegilops, used in tanning, dyeing, and making ink[C18: from Italian vallonia, ultimately from Greek balanos acorn] va•lo•ni•a (vəˈloʊ ni ə) n.pl. acorn cups of an Old World oak, Quercus macrolepis (or Q. aegilops), used in tanning. [1715–25; < Italian] Valonia Valonia the acorn cup (calyx) of several species of oak (Quercus vallonea from Asia Minor and Q. macrolepis from Italy and Greece). Valonia is 35-40 percent tanning substances, or tannins, which are used to tan and strengthen sole leather. Tannins are extracted from valonia by water at a temperature of 50-60° C. (They decompose at higher temperatures.) Valonia is usually used along with acorns; there is 29 percent tannin in the mixture. In the USSR the Q. vallonea and Q. macrolepis can be grown in western Transcaucasia and southern Crimea.
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