Meanings
nounnullary sum (plural nullary sums)
plural nullary sums
- arithmeticAn empty sum.
These concepts are expressed by sum types, specifically the binary sum, which offers a choice of two things, and the nullary sum, which offers a choice of no things.
2012, Robert Harper, Practical Foundations for Programming Languages, →ISBN, page 86
Synonyms & antonyms
Also see
Cite this entry
APA
nullary sum. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/nullary%20sum
MLA
“nullary sum.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/nullary%20sum. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “nullary sum,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/nullary%20sum.
Source: nullary sum on Wiktionary, CC BY-SA 4.0.