B-mode
Noun
Meaning
(attributive) brightness mode: a common kind of two-dimensional ultrasound image
(attributive) A divergence-free, curl-only polarization signal in the cosmic microwave background radiation.
Source: en.wiktionary.orgExamples
The BICEP2 experiment detected what was initially thought to be primordial B-mode polarization caused by gravitational waves in the early universe.
The team reported that POLARBEAR's measured B-mode polarization was of cosmological origin (and not just due to dust) at a 97.2% confidence level.