What's the difference between gadolinia and gadolinic?

Gadolinia

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Definition:

• (n.) A rare earth, regarded by some as an oxide of the supposed element gadolinium, by others as only a mixture of the oxides of yttrium, erbium, ytterbium, etc.

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Gadolinic

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Definition:

• (a.) Pertaining to or containing gadolinium.

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