(of the fingers or toes) nail; shell or carapace; ancient Chinese compass point:75°; civil administration unit (old); ranking system used in the Imperial examinations (old); letter "A" or roman "I" in list "A, B, C", or "I, II, III" etc; bladed leather or metal armor (old); (used for an unspecified person or thing); armor plating; first of the ten Heavenly Stems 十天干; first (in a list, as a party to a contract etc)