Meanings
cadr1
nouncadr (plural cadrs)
plural cadrs
- computingCar of the cdr in Lisp. The second element in a list.
If we let x denote the tree (1 2 3), then the car of x is 1, the cdr of x is (2 3), the cadr of x is 2, the caddr of x is 3, and the cdddr of x is nil.
2000, Matt Kaufmann, Panagiotis Manolios, J. Strother Moore, Computer-Aided Reasoning: An Approach
CADR2
nounCADR (uncountable)
- USabbreviationinitialismuncountableInitialism of Clean air delivery rate, a measure of cleaned air from air purifiers.
Origin
Contraction of car of the cdr.
Full word history & related roots →Rhymes & wordplay
Anagrams
Cite this entry
APA
cadr. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/cadr
MLA
“cadr.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/cadr. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “cadr,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/cadr.
Source: cadr on Wiktionary, CC BY-SA 4.0.