washbasin helmet

== English == === Etymology === From the helmet's appearance, similar to a washbasin of the early 20th century. === Pronunciation === === Noun === washbasin helmet (plural washbasin helmets) (military, slang) A style of soldier's helmet that is almost identical to or resembles the helmet used by the British Empire, Commonwealth and U.S. soldiery during World War I. ==== Related terms ====