D is the fourth letter in the ISO basic Latin alphabet. The Semitic letter Dâlet may have developed from the logogram for a fish or a door. There are various Egyptian hieroglyphs that might have inspired this. In Semitic, Ancient Greek, and Latin, the letter represented /d/; in the Etruscan alphabet the letter was superfluous but still retained (see letter B). The equivalent Greek letter is Delta, ⟨Δ⟩. The minuscule (lower-case) form of ⟨d⟩ consists of a loop and a tall vertical stroke. It developed by gradual variations on the majuscule (capital) form.