an industrial process for producing ammonia by reacting atmospheric nitrogen with hydrogen at about 200 atmospheres (2 × 107 pascals) and 500°C in the presence of a catalyst, usually iron
Word origin
named after Fritz Haber (1868–1934), German chemist
Haber process in American English
noun
a process for synthesizing ammonia from gaseous nitrogen and hydrogen under high pressure and temperature in the presence of a catalyst