[dahy-er-uh-sis] 
[-seez] . | 1. | the separation of two adjacent vowels, dividing one syllable into two. |
| 2. | a sign (¨) placed over the second of two adjacent vowels to indicate separate pronunciation, as in one spelling of the older forms naïve and coöperate: no longer widely used in English. |
| 3. | Prosody. the division made in a line or verse by coincidence of the end of a foot and the end of a word. |
[dahy-uh-ret-ik] , adjective dieresis di·er·e·sis (dī-ěr'ĭ-sĭs)
n.
See solution of continuity.
dieretic di·e·ret·ic (dī'ə-rět'ĭk)
adj.
Of or relating to dieresis.
Dividing; ulcerating; corroding.