What's the difference between aerologic and aerology?

Aerologic

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Definition:

• (a.) Alt. of Aerological

Example Sentences:

• (1) Preventive measures consist in a greater prudence, a good physical condition and a precise aerological knowledge.

Aerology

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Definition:

• (n.) That department of physics which treats of the atmosphere.

Example Sentences:

• (1) Preventive measures consist in a greater prudence, a good physical condition and a precise aerological knowledge.