The definition given by the misprints is of the form (3, 5, 5, 2, 1, 4-7, 7). The definition given in the perimeter is of the form (1, 11, 2, 7, 6, 2, 5), and begins at 40. Hence they both have 34 letters.
Both the definitions appear in these forms in Chambers - the two-word term A is listed under the first word. An interesting coincidence that the definitions both have the same number of letters, and so congrats to The Ace of Hearts for exploiting this. Just about makes up for the incredibly obscure answer to 10.