gridiron

1. Any object resembling the rack or grate. (countable, uncountable)
2. An openwork frame on which vessels are placed for examination, cleaning, and repairs. (countable, uncountable)
3. A raised framework from which lighting is suspended. (countable, uncountable)
4. The field on which American football is played. (countable, uncountable)

الجمع gridirons