Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective mathematics, physics Extremely weak

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

ultra- +‎ weak

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Examples

  • On the ultraweak photon emission phenomenon of a soybean.

    Archive 2005-12-01 2005

  • On the ultraweak photon emission phenomenon of a soybean.

    Prunings XIII 2005

  • Biophoton emission is synonymous with ultraweak photon emission, low-level biological chemiluminescence, ultraweak bioluminescence, and other similar terms which are together more common in the scientific litterature than biophoton.

    Recently Uploaded Slideshows 2009

  • \ "ultraweak\" photon emissions from living tissues in the UV-range of the spectrum.

    Recently Uploaded Slideshows 2009

  • That biophotons (also known as ultraweak photon emissions) exist had been established long before Oblak’s team took the striking images.

    All living things emit a faint glow. Could this light be useful? Jo Marchant 2026

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