prototrophs

https://doi.org/10.1351/goldbook.P04918
Microoganisms capable of growing at or below a temperature optimum of 15°C.
Source:
PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 164 (https://doi.org/10.1351/pac199264010143)