insignia
/ɪnˈsɪgnɪə; ɪn`sɪɡnɪə/ n[pl]
(a) symbols of rank or authority, eg the crown and sceptre of a king or queen 官阶识别符号, 象徵（如国王或王后的王冠及权杖）
the insignia of office 官职的标记.
(b) identifying badge of a military regiment, squadron, etc 军队、 航空队等的标记、 标志.