CEREMONY n.
d on ceremonies, Yet, now they fright me. Shak. Master of ceremonies, an officer who determines the forms to be observed, or superintends their observance, on a public occasion. -- Not to stand on ceremony, not to be ceremonious; to be familiar, outspoken, or bold.
CERIUM 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.