'Decipium' definitions:
- Decipium \De*cip"i*um\, n. [NL., fr. L. decipere to deceive.]
(Chem.)
A supposed rare element, said to be associated with cerium,
yttrium, etc., in the mineral samarskite, and more recently
called samarium. Symbol Dp. See Samarium.
[1913 Webster]