Elongated heat-detection device

Wikipedia Word definitions in Wikipedia
FireWire is Apple's trademark for the IEEE 1394 interface. Firewire or Fire wire may also refer to: Firewire, a Kidde trademark for a linear fire detection element, used in aircraft engine bays Firewire (Lateef the Truthspeaker album) Firewire , an album ...

Wiktionary Word definitions in Wiktionary
n. 1 A high speed digital link standard covered by the IEEE1394-1995 standard. 2 A system of wires or tubes designed to detect fire and trigger automatic fire-extinguishers in an aircraft engine compartment for example.