This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. From de- +‎ normal? or from denormalized?

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denormal (not comparable)

1. (computing theory, of a number) Smaller than the smallest normal number but larger than zero, thus serving to fill the underflow gap.

   Synonyms: denormalized, subnormal

denormal (plural denormals)

1. (computing theory) A number that is denormal.

   Synonym: subnormal

• Moreland, moreland

• IPA^(key): /denoɾˈmal/ [d̪e.noɾˈmal]
• Rhymes: -al
• Syllabification: de‧nor‧mal

denormal m or f (masculine and feminine plural denormales)

1. denormal