ASCII Character DUppercase D
The character "D" is the fourth letter of the Latin and English alphabets in its uppercase or capital form. In the standard English alphabet, its corresponding lowercase version is "d".
The shape of the uppercase "D" typically consists of a vertical line, known as a 'stem', and a right-facing semi-circle or half-oval attached to it, forming a closed shape. The specific design of the "D" can vary somewhat depending on the typeface or font being used.
In terms of pronunciation, the uppercase "D" in the English language represents a voiced alveolar stop, which means it's produced by obstructing airflow in the vocal tract with the tongue pressed against the alveolar ridge, which is the small ridge just behind the upper front teeth.
Historically, the letter "D" traces back to the Phoenician letter "dalet" which meant door. The Greeks borrowed it and named it 'delta'. The Romans adopted it as "D" and the sound value remained the same.
In modern grading systems, "D" often denotes below-average or poor performance. In music, "D" denotes a specific note in the fixed do solfège scale.