noun
: vitamin B 12 or a concentrate containing this vitamin and usually antibiotics obtained especially in the fermentation production of vitamin B 12 and chlortetracycline and used as a supplement in some animal and poultry feeds
noun
: vitamin B 12 or a concentrate containing this vitamin and usually antibiotics obtained especially in the fermentation production of vitamin B 12 and chlortetracycline and used as a supplement in some animal and poultry feeds
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012