American Heritage Dictionary
(3)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
As a minor point, though it seems like diaeresis should be written dieresis in America, I think that in general, the usage in America is to go with diaeresis.— Citizendium, the Citizens' Compendium - Recent changes [en]
I've tried work-arounds such as precomposing a Sigma with dieresis but can't get it to output the precomposition when typing Σ and ¨— MSDN Blogs
Far away to the north-west, a solitary heap of mountains marked the spot where the unvisited ruins of Bergeh are said to lie Transcriber's Note: A dieresis (umlaut) diacritical mark appears above the letter 'g' in the word Bergeh in the above sentence in the original Ismaeen sat before me, answering the various questions which the scene suggested.— Chambers's Edinburgh Journal, No. 462 Volume 18, New Series, November 6, 1852
Transcriber's notes The dieresis is transcribed by a preceding hyphen.— Fifty Years of Public Service
Rows of asterisks show the original page breaks The word "cooperation" was printed with dieresis (dots) over the second "o".— Modern Icelandic Plays Eyvind of the Hills; The Hraun Farm

American Heritage Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
We are still working on calculating this word's frequency.
Recently looked upspecifically · innocuous · Lamborghinis · fast · snitch |
Recent Favoritespygopagus · sanglant · Astacus · sweetbread · qualms |
Recent Pronunciationsweitläufig · und wenn sie nicht gestorben sind, so leben sie noch heute · redescheu · selbstverständlich · Glockenspiel |