D
Definition
Noun:
- The letter D: The fourth letter of the modern English alphabet and the Latin/Vietnamese alphabet.
- Roman numeral: The Roman numeral symbol for the number five hundred (500).
Symbol:
- In music: A note in the musical scale, or the second tone in the scale of C major.
- In education/grading: A letter grade indicating below-average or poor performance, often just above a failing grade.
- In shoe sizing: A width designation for shoes, typically indicating a standard or medium width for men's footwear.
Usage Examples
Noun:
- Từ "dog" bắt đầu bằng chữ D. (The word "dog" begins with the letter D.)
- Số 500 trong số La Mã được viết là D. (The number 500 in Roman numerals is written as D.)
Symbol:
- Bài hát được viết ở khóa D. (The song is written in the key of D.)
- Anh ấy nhận được điểm D cho bài luận. (He received a D grade for the essay.)
- Tôi cần đôi giày cỡ rộng, không phải cỡ D. (I need a wide shoe size, not a D width.)
Advanced Usage
"Vitamin D": A fat-soluble vitamin essential for bone health and immune function.
- Ánh nắng mặt trời giúp cơ thể sản xuất Vitamin D. (Sunlight helps the body produce Vitamin D.)
"D-Day": A military term for the designated day on which a combat attack or operation is to be initiated. Historically, it refers to June 6, 1944, the start of the Allied invasion of Normandy.
- D-Day là một bước ngoặt trong Thế chiến thứ hai. (D-Day was a turning point in World War II.)
Variants and Related Words
- D-flat (D♭): A musical note that is a semitone lower than D.
- D-sharp (D♯): A musical note that is a semitone higher than D.
- D-list: A term for minor or little-known celebrities.
Synonyms
- Five hundred (for the Roman numeral).
- Poor grade (for the academic mark).
Related Idioms
- "Dressed to the nines": Dressed very smartly or elaborately. (Note: This idiom uses the word "dressed," not the letter D itself, but is a common English phrase starting with D).
- "Dead as a doornail": Completely dead or inactive. (A common English idiom starting with D).