火线 Traditional form: 火線 Pinyin (reading): Huǒxiàn Definitions: FireWire (IEEE 1394 data-transfer interface) Characters: 火 - fire, flame; to burn; anger, rage 线 - line, thread, wire; clue, trail Traditional characters: 火 - fire, flame; to burn; anger, rage 線 - line, thread, wire; clue, trail