Overview
In Unicode, the symbol is U+2669 (♩).
A related value is the quarter rest (or crotchet rest). It denotes a silence of the same duration as a quarter note. It typically appears as the symbol and occasionally as the older symbol .
The note derives from the semiminima of mensural notation. The word crotchet comes from Old French crochet, meaning 'little hook', diminutive of croc, 'hook', because of the hook used on the note in black notation. However, because the hook appeared on the eighth note (or quaver) in the later white notation, the modern French term croche refers to an eighth note.
It is played for half the length of a minim (or "half note") and twice that of a quaver (an "eighth note"). It is one beat in a bar of 4/4. The term quarter note is a calque (loan translation) of the German term Viertelnote. The names of this note (and rest) in most languages are calqued from the same source:
| Language | note name | rest name |
|---|---|---|
| Catalan | negra | silenci de negra |
| Croatian | četvrtinka | četvrtinska pauza |
| Czech | čtvrťová nota | čtvrťová pauza |
| Danish | fjerdedelsnode | fjerdedelspause |
| Dutch | kwartnoot | kwartrust |
| French | noire | soupir |
| Galego | negra | silencio de negra |
| German | Viertelnote | Viertelpause |
| Greek | Tetarto (τέταρτο) | Pausi tetartou (παύση τετάρτου) |
| Italian | semiminima | pausa di semiminima |
| Norwegian | fjerdedelsnote | fjerdedelspause |
| Polish | ćwierćnuta | pauza ćwierćnutowa |
| Portuguese | semínima | pausa de semínima |
| Russian | четвертная нота | четвертная пауза |
| Slovak | štvrťová nota | štvrťová pomlčka |
| Spanish | negra | silencio de negra |
| Swedish | fjärdedelsnot | fjärdedelspaus |
| Finnish | Neljäsosanuotti | Neljäsosatauko |
| Turkish | dörtlük nota | dörtlük es |
| Chinese | 四分音符 | 四分休止符 |
The Galician, Catalan, French and Spanish names for the note (all of them meaning "black") derive from the fact that the semiminima was the longest note to be colored in mensural white notation, which is true as well of the modern form.
The Greek and Chinese names mean "quarter" (for the note) and "quarter's pause" (for the rest). In Greek, all music rests are called "pauses."
Read more about this topic: Quarter Note