olemus
diferentsiaalvõrrandis olevate
diferentsiaaloperaatorite suurim järk

Wikipedia:
the degree of a differential equation is the power of its highest derivative, after the equation has been made rational and integral in all of its derivatives

ülevaateid
https://www.efunda.com/math/ode/generalterms.cfm

https://www.examfear.com/notes/Class-12/Maths/Differential-Equations/1636/Order-and-Degree-of-Differential-Equation.htm

https://solitaryroad.com/c650.html