1930, E. E. Smith, Skylark Three, Fantasy Press, 1948, Chapter 3,
They saw the utter, absolute darkness of the complete absence of all light; and upon that indescribable blackness they beheld superimposed the almost unbearable brilliance of enormous suns concentrated into mathematical points, dimensionless.
(sciences) Of a physical constant: lacking units.
Iron has a density of 7.8 grams per cubic centimeter: its dimensionless relative density is 7.8.
Mac + Safari
iPhone + iPad
Google Chrome
Mozilla Firefox
Opera
Microsoft Edge