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Hardhead

From Biology-Online Dictionary
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Hardhead

1. Clash or collision of heads in contest.

2. (Science: zoology) The menhaden. See menhaden. Blocks gurnard (Trigla gurnardus) of Europe.

a California salmon; the steelhead.

The gray whale. See gray whale, under gray.

a coarse American commercial sponge (spongia dura).