What's the difference between aetheogamous and diaeresis?

Aetheogamous

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Definition:

• (a.) Propagated in an unusual way; cryptogamous.

Example Sentences:

Diaeresis

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Definition:

• (n.) Alt. of Dieresis

Example Sentences:

• (1) (That's why we all love the New Yorker's fanatical devotion to the diaeresis.)