From the web:
“Safety on the runway is expected to improve with the installation of advanced automated technology that will see potential dangers even at night at Seattle-Tacoma International Airport. The Port of Seattle is completing reconstruction of the center runway (16C/34C) which will also include making Sea-Tac only the second airport in the country to have a Foreign Object Debris (FOD) detection system and the first in the world to integrate detection of wildlife hazards into the system.”
There may be a more recent definition (16C/34C at SEA is ‘relatively’ recent), but that does not change the original designation of FOD.