Meaning
A set of two elements treated as one; a pair.
Etymology
Origin: Ancient Greek
From Ancient Greek δυάς (duás), δυάδ- (duád-) from δύο (dúo, “two”), from Proto-Indo-European *duwó, *duwéh₃ (*dwóh₁). The mathematics sense was coined by American scientist Josiah Willard Gibbs in 1884 in the second half of his book Elements of Vector Analysis.
Synonyms & Antonyms
NYT Puzzle Appearances
Accepted in 22 recorded puzzles:
- 2026-09-04DAELNYZ
- 2026-07-16DACIRTY
- 2026-06-19ACDEIMY
- 2026-06-03ADIPTVY
- 2026-05-23ACDEINY
- 2026-01-08ADYTIEM
- 2025-12-04DYAXLET
- 2025-11-28AYDRONI
- 2025-11-11YANLGDI
- 2025-09-20ADENYZL
- 2025-08-11DAOYIHL
- 2024-09-22YAZLIED
+10 earlier appearances in the archive.