What is abbreviation for mortuary science degree?

There isn't a single, universally accepted abbreviation for a mortuary science degree. The most common way to refer to it is simply "Mortuary Science" or "Funeral Service" followed by the degree (e.g., "Bachelor of Science in Mortuary Science," often abbreviated to B.S. in Mortuary Science or B.Sc. in Mortuary Science). You might also see AAS (Associate of Applied Science) in some cases.