Icelandic

Noun

óræð tala f ‎(genitive singular óræðrar tölu, nominative plural óræðar tölur)

1. (mathematics, arithmetic, not comparable) an irrational number; any real number that cannot be expressed as a ratio of two integers ^ant.

   π er óræð tala.

   The number π is irrational.

Antonyms

• (irrational number): ^def. ræð tala