massless

American  

[mas-lis] / ˈmæs lɪs /

adjective

Physics.

1. pertaining to an elementary particle having zero rest mass, as a photon.

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Other Word Forms

• masslessness noun

Etymology

Origin of massless

First recorded in 1875–80; mass + -less

Example Sentences

"Graphene is unique because its conduction electrons organize into massless waves, so I was curious if altering the physical geometry of a magnonic material to look like graphene would make it act like graphene," Kaman said.

From Science Daily

Among them are massless spin waves similar to graphene's electron waves, as well as low dispersion bands associated with localized states and even topological effects that span multiple bands.

From Science Daily

Neutrinos are extremely small, nearly massless particles that constantly pass through space, planets, and even our bodies, yet rarely interact with anything.

From Science Daily

Such events are capable of generating neutrinos -- tiny, almost massless particles that constantly pass through space and Earth.

From Science Daily

A few have also pursued the axion, a nearly massless particle originally proposed to solve a different problem with the theory of the strong nuclear force.

From Science Magazine