What is "long vowels"

Usage examples of "long vowels".

Similarly, short vowels are markedly more frequent than long vowels or diphthongs.

Since there were no humans present, Creideiki did not have to use the crisp consonants and long vowels of standard Anglic.

Bozhotz was like Cilme except that all B sounds became P sounds, and long vowels became diphthongs with terminal U's.

Bozhotz was like Cilme except that all B sounds became P sounds, and long vowels became diphthongs with terminal U’.