U.S. Marine Corps Dictionary

Cosmolene”

1. A protective fluid placed on rifles and other metal objects which hardens and keeps the item from rusting or corroding. It must be removed before the item can be used. 2. Also refers to something new as in, “it was still in Cosmolene”.


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DevilDogCorps.com is an unofficial online dictionary of terms and acronyms commonly used within the United States Marine Corps.