| Answer | Crossword Clue |
|---|---|
| ASIAN | One of several billion |
| ASIAN | One of three billion |
| ISLAM | Belief of one billion |
| HINDU | One of a billion |
| INDIA | Country of over one billion |
| ASIAN | One of about 3 billion |
| ISLAM | Faith of over one billion |
| ASIAN | One of 3.5 billion |
| ASIAN | One of 3.9 billion |
| AEON | One spelling of a billion years |
| ASIAN | One of two billion or so |
| AFRICAN | One of a billion or so |
| ASIAN | One of more than four billion |
| ISLAM | Faith of more than one billion |
| EON | Division of about one billion years |
| HINDU | One of over a billion religious adherents |
| NSEC | One of 60 billion in a min. |
| NEURON | One of about 100 billion in the human brain |
