What is "fairuzabadi"

Fairuzabadi, also known as El-Firuz Abadi or al-Fayrūzabādī (1329–1414) was an Arabic lexicographer and was the compiler of a comprehensive Arabic dictionary. The dictionary, called al-Qamous, was one of the most widely used in Arabic for nearly five centuries. His full name was Abu Tahir Majid al-Din Muhammad Ibn Ya'qub Ibn Muhammad Ibn Ibrahim al-Shirizi al-Fairuzabadi. The shorter form is Muhammad Ibn Ya'qub al-Firuzabadi.