massless

形容词 adj.
中文释义
美 /ˈmæs.ləs/|/ˈmæs.lɪs/

英文释义

形容词 adj.
  1. Having no mass. not-comparable
    — The photon is a massless particle.

词汇关系

反义词
massive

词源

Etymology tree
English mass
Proto-Indo-European *lewh₁-
Proto-Indo-European *lewHs-der.
Proto-Germanic *leusaną
Proto-Germanic *lausaz
Proto-Germanic *-lausaz
Proto-West Germanic *-laus
Old English -lēas
Middle English -les
English -less
English massless
From mass + -less.
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