Any of several fishes having a bony head, especially the Atlantic croaker. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "hardhead" in a sentence
"~ -- In the smelting of tin ores a quantity of speise, known as "hardhead," is produced."
"The fish they would be for are croaker (hardhead), or bluefish."
"I wriggled free of the queen, covered in goo and trying not to stumble in the loose piles of animal bones, wet rock, and mounds of hardhead eggs."