| X | the cardinal number that is the sum of fifteen and one |
|---|---|
| X | being one more than fifteen |
| X | the cardinal number that is the sum of sixteen and one |
| X | being one more than sixteen |
| X | the cardinal number that is the sum of seventeen and one |
| X | being one more than seventeen |
| X | (genetics) normal complement of sex chromosomes in a female |
| X | the cardinal number that is the sum of nineteen and one |
| X | denoting a quantity consisting of 20 items or units |
| X | the cardinal number that is the sum of twenty and one |
| X | being one more than twenty |
| X | the cardinal number that is the sum of twenty-one and one |