A lightweight helmet-shaped hat made of the pith of the sola or shola (Indian spongewood) plant covered with white cotton and faced with green cloth. Also known as a "sola topi", it was originally used by the British army in India in the 19th century, later used more widely.

(military, slang) A style of soldier's helmet that looks the same or similar to the helmet used by the British Empire, Commonwealth and U.S. soldiery during World War I.

plural of washbasin helmet

plural of helmet streamer

(astrophysics) A bright loop-like discharge of stellar matter in the corona of a star, connecting coronal holes of opposite magnetic polarity.

(slang) The glans penis.

A helmet intended to be worn while riding a bicycle.

plural of bicycle helmet

plural of helmeted guinea fowl

Alternative form of helmeted guineafowl