A person who makes, sells, or repairs hats. / (Australia, slang) A person who lives alone in the bush. / A miner who works by himself.

plural of amniotic fluid embolism

(inorganic chemistry) The binary compound of silicon and fluorine SiF₄, a colourless, poisonous gas with a pungent odour, used in the production of silicon semiconductors.

Beheading; the act of beheading or decapitating. / The ousting or destruction of the ruling body of a government or other organization. / (politics) The unseating of a senior politician.