Cor anglais is a double-reed woodwind instrument, which is commonly used in orchestral music. It is sometimes referred to as English horn, although it is neither English nor a horn. In fact, it is believed that the name "cor anglais" comes from the French word for "English horn".
The instrument has a mellow tone and is often used to play solos or to provide a deeper, richer sound to the music. Some of the synonyms for cor anglais include the "anglais horn," the "English horn," or simply the "oboe." As with many musical terms, the use of these different terms can vary depending on the musician, the orchestra, or the country where the music is being played. Regardless of its name, the cor anglais remains a key instrument in orchestral music and its unique sound adds depth to any composition.