Answer:
dictum
Step-by-step explanation:
According to a Merriam Webster Dictionary (specifically Webster's Ninth New Collegiate Dictionary), the word that comes after 'dictionary' in a dictionary is 'dictum.'
Dictum is defined as either (1.) a formal authoritative pronouncement of a principle, proposition, or opinion, or (2.) a judicial opinion on a point other than the precise issue involved in determining a case.