masslessness

发音

US /ˈmæs.lɪs.nɪs/
US /ˈmæs.ləs.nəs/

释义与例句

n.
  1. 1.

    Absence of mass; the state or condition of being massless.

    不可数

词源

From massless + -ness.

来源：wiktionary