- a letter of the Old English alphabet (ð, Ð), from Roman d, D, used to represent the voiced or voiceless apicodental fricative: in Middle English it was replaced by th
- the lowercase form of this letter as used in some phonetic alphabets, as the IPA, to represent the voiced apicodental fricative (?)
- The letter &edh;, used in Old English and Old Saxon manuscripts to represent both the voiceless sound (th) of Modern English thin and the voiced sound (&phonth;) of Modern English this, and in modern Icelandic orthography to represent the voiced sound (&phonth;).
- The symbol (&edh;) in the International Phonetic Alphabet representing the voiced interdental fricative, as in the or either.
Origin of edhIcelandic.
- Alternative form of eth.