variants
or less commonly bar code
plural barcodes also bar codes
1
: a code consisting of a group of printed and variously patterned bars and spaces and sometimes numerals that is designed to be scanned and read into computer memory and that contains information (such as identification) about the object it labels
… one version of the barcode reader used in supermarkets employs a laser scanner.—Science
I on the other hand boarded the traditional way. I handed my paper printout to the airport personnel, who scanned the barcode before letting me proceed.—Sanjeeb Patel
2
biology
: something (such as a DNA sequence) that uniquely identifies a species of organism
… they now plan to analyze each fish sample by decoding a certain tiny piece of DNA that can serve as a unique bar code for the species.—Christen Brownlee
bar coding
noun
Cite this Entry
“Barcode.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/barcode. Accessed 4 Sep. 2026.
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