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backscatter

backscatter

3 9.3
Unwanted emails that bounce back to fake sender addresses after spam
  • noun
  • /ˈbækˌskætər/
  • Texting
translation icon : mensaje de rebote
  • Figures 3a and 3b show the same carbon aggregate imaged with secondary electrons and backscatter electrons to visualize the surface morphology and the immunolabeling, respectively.

Examples

  • First, a significant relationship between PRI and s was found only for backscatter observations, suggesting that directional reflectance and shading effects overlapped and confounded the observed PRI signal.

    Academic text (2010)
  • Spammers often use forged addresses, which can lead to bounce messages called backscatter being sent to the original sender.

  • The reflected, or backscatter, signal must return to the receiver by a direct path.

    Academic text (2000)
  • Those differences alter reflectivity and thus distinguish the two ice types in radar-backscatter measurements.

    Academic text (2011)
  • Assume clouds with the smallest droplets backscatter most light when high cloud albedo is a large droplet phenomenon.

    Blog text (31)
  • TSA deploys two types of AIT: millimeter wave and general-use backscatter x-ray.

    Blog text (34)
  • Samples were prepared for light microscopy and for evaluation on an SEM equipped with an electron backscatter pattern (EBSP) system by using conventional metallographic procedures.

    Academic text (2000)
  • When email servers reject messages from spammers, they sometimes generate backscatter that clutters legitimate inboxes.

  • Many email security systems are designed to detect and manage backscatter to protect users from unwanted spam.

Synonyms

bounce-back
vsbackscatter
  • Texting
1 3.7

An automatic message that tells the sender their email was not delivered

occurs when notifications go to forged addresses because of spam, not original senders

Surface Forms

backscatter singular
backscatters plural

Morphology

backscatter = scatter (semi-transparent) = back + scatter

Formally 'back' + 'scatter' is clear, but the specialized email-security meaning (bounces to forged senders) is a metaphorical/technical extension not obvious to general learners.

Etymology

Backscatter combines back ('back') and scatter ('to spread or throw about'). In email, it means unwanted bounced messages that 'scatter back' to many addresses because spammers used fake senders, so they fill innocent inboxes.