diaeresis or dieresis /dī-ērˈi-sis or -erˈ/

1. A mark ( ¨ ) placed over a vowel, esp the second of two adjacent ones to show that it is to be pronounced separately, as in naïf
2. A pause or break where the end of the word coincides with the end of a foot (prosody)

• metagrobolizing
• metal
• metal.
• metalanguage
• metalanguages
• metal composite
• metaldehyde
• metaldehydes
• metal detector
• metal detectors
• metaled
• metalepses
• metalepsis
• metaleptic
• metaleptical
• metal fatigue
• metal fatigues
• metaling
• metalinguistic
• metalinguistically
• metalinguistics
• metalist
• metalists
• metalize
• metalized