When you declare your major to the college or university, and you are accepted to that program of study, you are identified as a matriculated student. Thus, you matriculate.
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The above answer is what you become when you complete a major. I believe the question is what is it called when you CREATE your OWN major.
I can think of two things that it is called, some schools might have different names for it and I hope people will add that content if they can.
I have heard it called an Individualized Major Plan (IMP), and also a Liberal Arts degree. I got a Behavioral Science AA degree on my way to a BA as a combined degree. There was no Behavioral Science degree listed in the catalog, but my classes were more broad than the psychology degree at my community college.
Hope that helps clarify a little.
major
It is typically referred to as your major.
major
Good question, but based on your inability to create a coherent English sentence should steer you clear of that major also.
Major
Their major, or program of study.
Music is a college major. Marketing is a college major. Mechanical engineering is a college major.
Your thinking of Major-college level or above
Yes - it is sometimes called biomedical engineering.
What was Oprah's major in college
Well, one thing is that you would be referred to as a transfer student.
Animation majors learn to create graphics and animation for mediums including film, TV, computer games, and more.