phosphorous

adj

1. (not-comparable)Of or pertaining to phosphorus.
2. (not-comparable)Resembling phosphorus.
3. (not-comparable)Of, relating to, or containing trivalent phosphorus.

noun

1. (alt-of, misspelling, proscribed, uncountable)Misspelling of phosphorus.

   “As a former civilian resident of west Beirut, bombed with American-made phosphorous and cluster bombs by the Israelis, I am outraged by this.”