Definition of "niggerhead" [nig•ger•head]

• A bollard made from an old cannon. (noun)
• A geode. (noun)
• A coneflower. (noun)
• An isolated part of a coral reef. (noun)
• (Can we clean up(+) this sense?) A tussock (clump of plant material), found on tundra. (noun)

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• "J.F. Boepple began, at Muscatine, Iowa, to utilize the unio or "niggerhead" shells found along the Mississippi."
• "The boundaries of the claim totalled nearly a mile, and most of it was over the uneven surface of a snow-covered, niggerhead flat."
• "The foe things your niggerhead needs to be fitten for the Big Water."