Cerium
[siәriәm]
Definition
(noun.) a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group.
Checked by John--From WordNet
Definition
(n.) A rare metallic element, occurring in the minerals cerite, allanite, monazite, etc. Symbol Ce. Atomic weight 141.5. It resembles iron in color and luster, but is soft, and both malleable and ductile. It tarnishes readily in the air.
Typed by Connie
Definition
n. a rare metal found in the mineral Cē′rite which is its hydrated silicate.
Edited by Eileen
Examples
- Iridium and Osmium discovered by Tenant, and Cerium by Berzelius. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
- He made a cylindrical mantle of thin fabric, and then soaked it in a solution of thorium and cerium until it became saturated with the chemical. Bertha M. Clark. General Science.
- When certain substances, such as thorium and cerium, are heated, they do not melt or vaporize, but glow with an intense bright light. Bertha M. Clark. General Science.
- The mantle thus impregnated with thorium and cerium is placed on the gas jet, but before the gas is turned on, a lighted match is held to the mantle in order to burn away the thin fabric. Bertha M. Clark. General Science.
- After that came a lot of experimenting--covering the wire with oxide of cerium and a number of other things. Rupert S. Holland. Historic Inventions.
Editor: William