XX
WordNet
adjective
(1) Denoting a quantity consisting of 20 items or units
noun
(2) (genetics) normal complement of sex chromosomes in a female
(3) The cardinal number that is the sum of nineteen and one
WiktionaryText
Cardinal number
- Number of the Roman numeral: XX (20)
- Previous: XIX (19)
- Next: XXI (21)
- A Roman numeral representing the number twenty (20).