QR code
CEFR: B1
A machine-readable optical code consisting of an array of black and white squares, used to store URLs and transit fares.
Synonyms
- QR code descriptor
- scientific term
Common Collocations
- analysis of QR code
- features of QR code
- significance of QR code
Example Sentence
The empirical passage in Cambridge IELTS 21 investigates the role of QR code in its specific analytical context.