I'm attempting to read a book from 1978 called A Practical Guide to Splines by Carl de Boor. In it he says: A polynomial of order n or of degree < n is a function of the form $p(x) = a_1 + a_2x + \ldots + a_nx^{n-1}$
I'm getting a bit confused as Wolfram and Wikipedia both say order and degree are the same. Has the meaning of the word order changed in recent decades?