Of an oil or natural gas pipeline: having a large diameter.
1With the and capital initials. A large-diameter oil pipeline running from the Texas oilfields to the industrial north-east of the United States, laid during the Second World War (1939–45).
The pipeline was purchased from the United States government by the Texas Eastern Transmission Corporation in 1947, and is now used for natural gas.
2Generally. A large-diameter pipeline for oil or natural gas.
1940s; earliest use found in Excavating Engineer. From big + inch.