D, letter that has retained the fourth place in the alphabet from the earliest point at which it appears in history It comes from the greek delta and the phoenician dalet. It corresponds to semitic daleth and greek delta (δ)
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The form is thought to derive from an early pictograph, possibly egyptian, indicating the folding door of a tent.
D, d (di) n., pl
The fourth letter of the english alphabet, a consonant Any spoken sound represented by this letter. The fourth letter of the english alphabet, a consonant. See examples of d used in a sentence.
For example, 'you had' can be shortened to 'you'd' It is added to the end of the pronoun which is the subject of the verb For example, 'i would' can be shortened to 'i'd' Collins cobuild advanced learner’s dictionary
In some languages and transcription systems, d may also represent other sounds, such as /t/ or /ð/.
D is the fourth (number 4) letter in the alphabet