名詞 photon:

1. a quantum of electromagnetic radiation; an elementary particle that is its own antiparticle

pho.ton

n.（名詞）
The quantum of electromagnetic energy, generally regarded as a discrete particle having zero mass, no electric charge, and an indefinitely long lifetime.See table at subatomic particle
光子，光量子：電磁能的量子，一般認(rèn)為是有零質(zhì)量、無(wú)電荷和不定長(zhǎng)壽命的離散性粒子參見 subatomic particle
A unit of retinal illumination, equal to the amount of light that reaches the retina through square millimeter of pupil area from a surface having a brightness of candela per square meter.
光度：視網(wǎng)膜亮度單位，相當(dāng)于每平方米有一燭光亮度的表面，通過(guò)一平方毫米的瞳孔區(qū)域，到達(dá)視網(wǎng)膜的光線數(shù)量

【引伸】
photon.ic
adj.（形容詞）