RADIUM n.
An intensely radioactive metallic element found (combined) in minute quantities in pitchblende, and various other uranium minerals. Symbol, Ra; atomic weight, 226.4. Radium was discovered by M. and Mme. Curie, of Paris, who in 1902 separated compounds of it by a tedious process from pitchblende. Its compounds color fla…
RATTAN n.
One of the long slender flexible stems of several species of palms of the genus Calamus, mostly East Indian, though some are African and Australian. They are exceedingly tough, and are used for walking sticks, wickerwork, chairs and seats of chairs, cords and cordage, and many other purposes.