Cadr
//ˈkɑːdə// noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 Car 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."
- 2 Initialism of Clean air delivery rate, a measure of cleaned air from air purifiers. US, abbreviation, alt-of, initialism, uncountable
Example
More examples"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."
Etymology
Contraction of car of the cdr.
More for "cadr"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.