WordReference Random House Unabridged Dictionary of American English © 2026
num′ber line′, [Math.]
  1. Mathematicsa straight line on which there is indicated a one-to-one correspondence between points on the line and the set of real numbers. Also called real line. 
  • 1955–60

'number line' also found in these entries (note: many are not synonyms or translations):
real line

Forum discussions with the word(s) "number line" in the title:


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