profilograph
noun
pro·fil·ograph
prōˈfiləˌgraf,
-fīl-,
-rȧf
1
: an instrument borne on wheels for recording automatically the profile of the land over which it travels
2
: an instrument for measuring smoothness of a surface (as of a metal casting) by amplification of the minute variations from the plane or arc of smoothness
Word History
Etymology
International Scientific Vocabulary profile entry 1 + -o- + -graph; originally formed as French profilographe