xx
1. [ adjective ] denoting a quantity consisting of 20 items or units
Synonyms: 20 twenty score
Related terms: cardinal
2. [ noun ] (genetics) normal complement of sex chromosomes in a female
Related terms: sex_chromosome genetics
3. [ noun ] (mathematics) the cardinal number that is the sum of nineteen and one
Synonyms: 20 twenty
Related terms: large_integer
Similar spelling:   xxy
  XXX
  XXI
  xxxi
  XXII
  xxxii
  XXIII