Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License.
 noun Absence of
mass ; the state or condition of beingmassless .
Etymologies
from Wiktionary, Creative Commons Attribution/ShareAlike License
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Examples

Parallel plants exhibit "masslessness," seem frozen in time, lack internal structure, and generally collapse to dust at a human touch.
parallel botany jlundberg 2008

The dark photon comes from a gauge symmetry, just like the ordinary photon, and its masslessness is therefore completely natural.
Dark Photons Sean 2008

Coulomb's law seems to be valid at the longest distances so it must be set up by the photons close to masslessness.
Forces 2001

When two charges are far away the uncertainty relation gives little freedom and the photon is closer to masslessness, We know that
Forces 2001

If we put the energy and the treedimensional momentum together into the fourmomentum we see that it is not constrained by the masslessness condition, we say that the photon is virtual and consequently has a (virtual) mass.
Forces 2001

Although the masslessness is ultimately destroyed by the Majorana mass terms (or by ordinary
The Reference Frame 2010
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