transferrin
noun
trans·fer·rin tran(t)s-ˈfer-ən 
: a beta globulin in blood plasma capable of combining with ferric ions and transporting iron in the body
Example Sentences
Recent Examples on the Web UConn also has commitments from Lee Molette, a 6-foot-3 all-around athlete from Brentwood, Tenn., and Tres Barbosa, a 295-pound lineman transferrin from Texas-El Paso, and Sokoya McDuffie, a defensive lineman from Old Dominion. 
Dom Amore, courant.com, 1 Feb. 2022 Her nasal drainage was later analyzed and tested positive for beta-2 transferrin, a marker that’s found almost exclusively in cerebrospinal (aka brain) fluid. Korin Miller, Health.com, 2 Oct. 2020 The organoid also pumped out standard human liver proteins, including albumin and transferrin. Beth Mole, Ars Technica, 22 July 2017
Dom Amore, courant.com, 1 Feb. 2022 Her nasal drainage was later analyzed and tested positive for beta-2 transferrin, a marker that’s found almost exclusively in cerebrospinal (aka brain) fluid. Korin Miller, Health.com, 2 Oct. 2020 The organoid also pumped out standard human liver proteins, including albumin and transferrin. Beth Mole, Ars Technica, 22 July 2017 Word History
Etymology
trans- + Latin ferrum "iron" + -in entry 1 — more at farrier
Note: The term was first suggested by Carl G. Holmberg and C.-G. Laurell in "Nature of Serum Copper and its Relation to the Iron-binding Protein in Human Serum," Acta Chemica Scandinavica, vol. 1 (1947), p. 950.
First Known Use
1947, in the meaning defined above
Medical Definition
transferrin
noun
trans·fer·rin tran(t)s-ˈfer-ən
: a beta globulin in blood plasma capable of combining with ferric ions and transporting iron in the body
called also siderophilin