Meanings
nounCooke triplet (plural Cooke triplets)
plural Cooke triplets
- historicalA photographic lens comprising a negative flint glass element in the centre with a crown glass element on each side.
Origin
Named after the company T. Cooke & Sons of York, whose chief engineer Dennis Taylor designed it in 1893.
Full word history & related roots →Cite this entry
APA
Cooke triplet. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Cooke%20triplet
MLA
“Cooke triplet.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Cooke%20triplet. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Cooke triplet,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Cooke%20triplet.
Source: Cooke triplet on Wiktionary, CC BY-SA 4.0.