I remember often having professors in college use degree symbols to write shorthand versions of Latinate ordinal numbers.
1° Primary 2° Secondary 3° Tertiary 4° Quaternary
I have a few questions regarding this shorthand approach:
Does this approach have a name?
What is the origin of this approach?
Is it simply a shorthand developed by professors or is it more widely used?
I thought I'd gain insight by exploring the use of superscript primes in the sciences, but I didn't find answers to my questions via that rabbit hole adventure...