actinomycin
- n any of various red antibiotics isolated from soil bacteria
- The first antibiotic ever isolated by Nobel Prizewinner Selman Waksman was actinomycin.
- The technique is not without its hazards; actinomycin D increases skin reactions to radiation.
- For this job the Brigham doctors had decided to rely on drugs, and they used a battery of the most potent available: azathioprine (a new immunity suppressor), actinomycin C (an .