Terkel Nissen Rosenqvist (2 October 1921 – 1 April 2011) was a Norwegian chemist and metallurgist.
His parents were businessman Einar Rosenqvist (1892–1962) and Julia (Mulka) Marija Kos (1893–1939).
He was a research assistant at the university, and also worked as a chemist and metallurgist for Elektrokemisk and Christiania Spigerverk.
He was appointed at the Norwegian Institute of Technology in 1945, before being an instructor from 1947 and assistant professor from 1950 at the University of Chicago.
He was appointed as an acting docent at the Norwegian Institute of Technology in 1952, and after taking his dr.techn.