One of the mysteries of the English language finally explained.
Of or relating to data used for the criminal identification system Bertillonage. Now historical.
Mid 19th century (in an earlier sense). In sense 1 either irregularly from sign + -al + -etic, or perhaps from signal + -etic; perhaps compare French signalétique containing a description of a thing, marking a thing.
In this article we explore how to impress employers with a spot-on CV.