rfid

rfid — noun

1. a system that uses small electronic tags and radio signals to identify objects,

1.名詞B2
釋義

a system that uses small electronic tags and radio signals to identify objects, animals, or people without needing to touch them or see them directly.

例句

The public library in Taipei uses RFID tags on all its books to prevent theft.

collocation: RFID tags

Noor's cat has an RFID chip under its skin so the vet can identify her if lost.

collocation: RFID chip

同義詞
  • barcode

    an older, simpler identification system that uses printed black lines instead of radio signals; cheaper but needs direct line-of-sight scanning

  • NFC

    a related short-range wireless technology used for contactless payments; NFC is a type of RFID that works only at very close distances

用法筆記

RFID is an uncountable noun — you cannot say 'an RFID.' To refer to a single device, use 'an RFID tag', 'an RFID chip', or 'an RFID reader.' The word is often used as a modifier before another noun.

常見錯誤

❌The delivery company put an RFID on every package.
✅The delivery company put an RFID tag on every package.
💡RFID is the name of the system, not the physical tag itself.

2. the full form of the letters R-F-I-D, meaning Radio-Frequency Identification.

2.名詞B2
釋義

the full form of the letters R-F-I-D, meaning Radio-Frequency Identification.

例句

On the first day of class, the teacher explained that RFID stands for Radio-Frequency Identification.

collocation: stands for

Joon learned that RFID is short for Radio-Frequency Identification in his engineering class.

collocation: is short for

用法筆記

This sense only explains what the abbreviation stands for. When talking about how the technology works or is used, use sense 1 (TRACKING TECHNOLOGY) instead.