帽

creased eboshi hat

black silk or paper triangle worn over the forehead (usu. worn by children)

man-of-war fish (Nomeus gronovii)

Inversidens brandti (species of freshwater mussel)

Medicine

mitral regurgitation; mitral insufficiency; mitral incompetence

Clothing

ushanka (fur hat)

Historical term

eboshi; black-lacquered headgear made of silk, cloth or paper, originally worn by court nobles in ancient Japan

Rare term

red hat

Rare term

bowler hat; felt hat

Rare term

helmet; helmet liner