individual

https://doi.org/10.1351/goldbook.14760
One whole organism.
Note: Individuals have size, shape, and health or condition. They grow, reproduce, and die over time.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 900 [Terms] [Paper]