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| 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. |
cathode ray cath·ode ray (kāth'ōd')
n.
A stream of electrons emitted by the cathode in electrical discharge tubes.
One of the electrons that is emitted in a stream from a cathode-ray tube.
| cathode ray
A beam of electrons streaming from the negatively charged end of a vacuum tube (the cathode) toward a positively charged plate (the anode). |