DIAERESIS; DIERESIS n. 2 definitions
A mark consisting of two dots [..], placed over the second of two adjacent vowels, to denote that they are to be pronounced as distinct letters; as, coöperate, aërial.
DICTATION n. 2 definitions
The speaking to, or the giving orders to, in an overbearing manner; authoritative utterance; as, his habit, even with friends, was that of dictatio.