(chemistry) a process for lowering the sulfur content of petroleum and similar products by catalytic hydrogenation, sulfur compounds being converted to hydrogen sulfide
llanfairpwllgwyngyll
llanfairpwllgwyngyll
Proper noun
A town in Anglesey, Wales, full name Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch.