Bible Dictionaries
Dieresis

Webster's Dictionary

(1):

(n.) Same as Diaeresis.

(2):

(n.) The separation or resolution of one syllable into two; - the opposite of synaeresis.

(3):

(n.) 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, cooperate, aerial.

Bibliography Information
Webster, Noah. Entry for 'Dieresis'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​d/dieresis.html. 1828.