1852 Anderson in Q.Jrnl. Chem. Soc. IV. 117The yellow precipitate thus obtained is the hydrobromate of tribromocodeine. 
1900 Smith Richter'sOrg. Chem. II. 92Aniline, acted upon by..bromine, yields..Tribromaniline. 
tribromo-
combining form 
see tribrom-
see tribrom-