| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
Yukawa (y -kä'wä) Pronunciation Key
Japanese physicist who in 1935 mathematically predicted the existence of the meson, for which he was awarded the 1949 Nobel Prize for physics. |