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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Oak apple ： ウィキペディア英語版 Oak apple Oak apple or oak gall is the common name for a large, round, vaguely apple-like gall commonly found on many species of oak. Oak apples range in size from 2–5 cm in diameter and are caused by chemicals injected by the larva of certain kinds of gall wasp in the family Cynipidae.〔 The adult female wasp lays single eggs in developing leaf buds. The wasp larvae feed on the gall tissue resulting from their secretions. Considerable confusion exists in the general 'literature' between the oak apple and the oak marble gall. The oak marble is frequently called the oak apple due to the superficial resemblance and the preponderance of the oak marble gall in the wild. Other galls found on oak trees include the oak artichoke gall and the acorn cup gall, but each of these has its own distinctive form. Some common oak-apple-forming species are the ''Biorhiza pallida'' gall wasp in Europe, ''Amphibolips confluenta'' in eastern North America,〔Oxford English Dictionary〕 and ''Atrusca bella'' in western North America. Oak apples may be brownish, yellowish, greenish, pinkish or reddish. ==Iron gall ink== (詳細はRoman Empire. From the Middle Ages to the early twentieth century, iron gall ink was the main medium used for writing in the Western world. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oak apple」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.