f
/ef/ (bre, ipa) · [ˈɛf] /ef/ (ame, ipa) · [ˈɛf] /ˈef/ (ame, mw)
f — noun
- fsingular
- fsplural
1. the sixth character in the English alphabet — you can write it as a capital F or
the sixth character in the English alphabet — you can write it as a capital F or a small letter f.
The word 'fox' starts with the letter f.
f + starts a word — initial position
Amelia wrote a capital F at the top of her spelling test.
capital F — uppercase form
The teacher asked the class to circle every letter f on the page.
In the word 'giraffe', the letter f appears twice at the end.
文法句型
f + is
常見錯誤
2. the fourth note in the scale of C major and the sixth note in the scale of A min
the fourth note in the scale of C major and the sixth note in the scale of A minor — one of the seven natural notes in Western music.
Nikos played an F on the piano with his right hand.
played an F — producing the note
The choir began the song by singing a long, steady F note.
This piece of music is written in the key of F major.
Salma learned to play an F chord on her guitar last week.
文法句型
F + major/minor
key of F
F + note
用法筆記
In written music, F is often marked with a sharp (F♯) or flat (F♭) to change its pitch. The F clef (bass clef) is named after this note.
常見錯誤
3. a short way of writing Fahrenheit, a scale that measures temperature — on this s
a short way of writing Fahrenheit, a scale that measures temperature — on this scale, water freezes at 32° and boils at 212°.
The weather report says it will reach 85°F this afternoon.
number + °F — temperature reading
Set the oven to 350°F and bake the cake for thirty minutes.
Water freezes at 32°F, which is zero degrees Celsius.
The doctor said the baby's temperature was 99°F, which is normal.
文法句型
number + °F
用法筆記
The Fahrenheit scale is used mainly in the United States for everyday weather, cooking, and body temperature. Most other countries use the Celsius scale.
常見錯誤
f — abbreviation
1. a written abbreviation for 'female' — used on documents, forms, and official rec
a written abbreviation for 'female' — used on documents, forms, and official records to show a person's sex.
Please check the box marked 'F' for female on the application form.
The hospital record shows the patient's gender as F.
gender as F — abbreviation on records
Nila circled 'F' on the survey form next to the question about gender.
The ID card has a small F printed next to the word 'Sex'.
- M
abbreviation for male; the opposite category on forms
文法句型
F + on forms
gender: F
用法筆記
This abbreviation appears on forms and official documents alongside M (male). It is always written as a single capital letter without a period in modern usage.
常見錯誤
2. a written abbreviation for 'feminine' — used in dictionaries and grammar books t
a written abbreviation for 'feminine' — used in dictionaries and grammar books to show that a word belongs to the feminine gender in languages that have grammatical gender.
In French, the word 'table' is marked as f for feminine.
f for feminine — grammatical gender marking
The dictionary entry shows 'f' next to feminine nouns in German.
Anong checked the grammar table and saw that 'rosa' is f in Italian.
In Spanish, nouns marked f change the adjective ending to 'a'.
文法句型
f + for feminine
f + noun class
用法筆記
This abbreviation appears in language textbooks and dictionaries alongside m (masculine) and sometimes n (neuter). It indicates the grammatical gender class, not the biological sex of the thing described.
常見錯誤
3. a written abbreviation for 'forte' (from Italian), meaning to play or sing a pie
a written abbreviation for 'forte' (from Italian), meaning to play or sing a piece of music loudly and strongly.
The conductor marked the final section with an f for loud playing.
marked with an f — notation in sheet music
João played the passage marked f with great energy and power.
When the sheet music says f, the orchestra must play very loudly.
The trumpet section played the bars marked f while the violins played softly.
- forte
the full Italian word that f abbreviates; used in the same way on sheet music
- p
abbreviation for piano (soft); opposite dynamic marking
文法句型
f + in sheet music
marked f
用法筆記
In written music, f is a dynamic marking that tells the performer how loudly to play. It is part of a range from pp (pianissimo, very soft) to ff (fortissimo, very loud). Double f (ff) means even louder than a single f.
常見錯誤
f — symbol
1. the chemical symbol for fluorine, a pale yellow gas that is one of the elements
the chemical symbol for fluorine, a pale yellow gas that is one of the elements — it is the ninth element on the periodic table.
On the periodic table, the symbol F stands for fluorine.
symbol F for fluorine — periodic table notation
The chemical formula HF contains one atom of hydrogen and one atom of F.
Fluorine (F) is a pale yellow gas that reacts with almost every other element.
Toothpaste contains fluoride compounds, which come from the element F.
文法句型
F + for fluorine
F + on periodic table
用法筆記
As a chemical symbol, F is always capitalised and never followed by a period. In chemical formulas it represents one atom of fluorine. Toothpaste often contains fluoride compounds, which are derived from fluorine.