Late 19th century; earliest use found in Daniel Roosa (b. 1838). From ancient Greek ὠτ-, οὖς ear + haematoma, after German Othaematoma (or Othämatom).
英语词典包含243303条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。