auxotroph

https://doi.org/10.1351/goldbook.15492
Organism unable to synthesize an organic molecule which is required for its growth: When the compound is given to the organism with the other nutrients it requires, growth of the organism may occur.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1173 [Terms] [Paper]