Definition of "niggerhead" in Anglais

noun

(nautical, dated, now offensive) A bollard made from an old cannon.
(geology, archaic, colloquial, now offensive) A geode.
(now offensive) A coneflower.
(now offensive) A coral or stone outcrop that stands above the surface of the water.
(US, Alaska, dated, now offensive) A tussock (clump of plant material), found on the tundra.
(archaic, countable, uncountable) A strong black variety of chewing tobacco, usually in twisted plug form.
(archaic, offensive, dialectal) A stone, piece of gangue, or lump of coal that is of a grade with a certain size.
(vulgar, ethnic slur, offensive, derogatory) A term of abuse for a black person.