plural of coal scuttle helmet

A helmet intended to be worn while riding a bicycle.

(historical) A helmet that entirely covers the head, including the face.

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.

A gastropod mollusc, Cassis cornuta

Protective headgear worn by a construction worker; a hard hat.

A helmet worn by motorcyclists worn to protect the head in case of an accident.

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.