| Clue | Source | Date |
|---|---|---|
| Elementary substances | Thomas Joseph | 08 Sep 2023 |
| Simple organisms | Eugene Sheffer | 25 May 2023 |
| Simple organisms | Wall Street Journal | 14 Jan 2021 |
| It means "units" in Philosophy | ||
| Single things | New York Times | 18 Feb 2020 |
| Single-celled organisms | Universal | 01 Nov 2016 |
| Single-celled organisms | USA Today | 09 Mar 2016 |
| Indivisible units | Wall Street Journal | 11 Sep 2015 |
| Indivisible units | ||
| One-celled organisms | ||
| One and the same | ||
| Elementary parts | ||
| Units | ||
| Single-celled critters | ||
| Single-celled organisms | ||
| Single-celled organisms | ||
| Units | ||
| Units | ||
| Simple organisms | ||
| Simple organisms. | ||
| Atoms. | ||
| Units. | ||
| Univalent atoms. | ||
| Indestructible units. | ||
| Units of matter. |