One of the mysteries of the English language finally explained.
1Chemistry and Medicine. A record or image produced as the result of an ionographic separation, typically a series of spots or bands on the support medium.
2Atmospheric Physics. A graphical record of the data transmitted by an ionosonde.
1950s; earliest use found in Journal of the American Chemical Society. From iono- + -gram, in sense 1 after ionography.
In this article we explore how to impress employers with a spot-on CV.