W.D.

US 
UK 
abbr.
1.
〈美,旧〉(=War Department)陆军部
2.
(=Works Department)工程部

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard