| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| the offspring of a zebra and a donkey. |
reactor (rɪˈæktə) ![]() | |
| —n | |
| 1. | chem a substance, such as a reagent, that undergoes a reaction |
| 2. | short for nuclear reactor |
| 3. | a vessel, esp one in industrial use, in which a chemical reaction takes place |
| 4. | a coil of low resistance and high inductance that introduces reactance into a circuit |
| 5. | med a person sensitive to a particular drug or agent |