Introduce to you a very useful online dictionary.

Medical Dictionary   with Traditional Chinese (and other languages  too)

介紹你一個非常有用的網址,是美國國家醫學圖書館的<<醫療詞典>>,  是中英文的.(其實是多種文字的)

http://www.nlm.nih.gov/medlineplus/languages/chinesetraditional.html