1. A generator for short-lived isotopes based upon successively eluting or otherwise separating (“milking”) a short-lived radioactive daughter from a longer-lived parent;
2. The mature female of domestic cattle (genus Bos); also the mature female of certain other animals such as buffalo, elephant, and whale.
The information shown above for cow is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.