hardhead
释义（英文）
名词 Noun
- One who is practical or hardheaded.
- A brown diving duck, Aythya australis, native to Australia.
- Any of certain saltwater sciaenid (Sciaenidae) fishes.
- Mylopharodon conocephalus of fresh waters in California.
- Any of several weeds in or formerly classified in the genus Centaurea, especially Russian knapweed (Acroptilon repens).
- (metallurgy) Residual ore that failed to melt during a smelting process.
- (obsolete) Clash or collision of heads in contest.
- (historical) A Scottish billon coin circulated in the reigns of Mary and James VI.