Plural form of pic in the sense of "picture".
"The archaic manuscript records the term pix as an obsolete spelling of pyx."
Obsolete spelling of pyx
In plain English: Pix is short for pictures, which are photos you can send to friends on your phone.
"She asked her friends if they had any pix from their recent trip to share with everyone."
Usage: Use "pics" as an informal plural noun to refer quickly to multiple pictures, especially when texting or speaking casually. Avoid using it in formal writing where "photos," "images," or "pictures" are preferred for clarity and professionalism.
Obsolete spelling of pyx
"The archaic manuscript listed several religious vessels, including a few references to pixes as containers for communion wafers."
Pix is an abbreviation of pictures that appeared in the trade publication Variety in 1916 as part of a collection of slang terms. The word entered English usage during this era to serve as a convenient shorthand for photographs or images.