diploma
n.an official document that shows you have finished a course of study or graduated from a school.
n.a certificate issued by an educational institution, such as a university or high school, testifying that the recipient has successfully completed a particular course of study.
“She proudly hung her high school diploma on the wall.”
“After three years of hard work, he finally received his diploma in graphic design during the graduation ceremony.”
“While a degree usually represents a multi-year academic program, a diploma often focuses on specific vocational skills required for immediate entry into a professional field.”
Commonly takes the preposition 'in' to specify the subject of study.
PIE word *dwóh₁ From Latin diplōma, from Ancient Greek δίπλωμα (díplōma, “folded paper, license”), from διπλόω (diplóō, “I double, fold over”), from διπλόος (diplóos, “double”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.