ö

ö (Latin Small Letter O With Diaeresis, U+00F6) is a lowercase 'o' adorned with two dots above it. This character is most famously an "o-umlaut" in German, where it signifies a distinct vowel sound, and is also found in the alphabets of languages like Swedish, Icelandic, Hungarian, Finnish, and Turkish. The two dots historically evolved from a small 'e' written over the 'o', leading to the common "oe" substitution when 'ö' isn't available. Although visually the same, these dots are linguistically called an "umlaut" when denoting a vowel mutation, and a "diaeresis" (or trema) when indicating that adjacent vowels are pronounced separately, showcasing its versatile role in various writing systems.