(biochemistry) A unit comprising two or more iron atoms and bridging sulfur ligands in an iron-sulfur protein.

(Britain) Alternative spelling of iron-sulfur cluster

(biochemistry) any protein in which iron is coordinated with cysteine sulfur and sometimes also with inorganic sulfur; they have electron transfer and enzymatic function

(Britain) Alternative spelling of iron-sulfur protein

(historical) A falsely or neo-medieval torture device invented in the 18th century consisting of a chamber lined with spikes which closes upon and impales the victim inside.

Any ore of iron which is impure through the admixture of silica or clay. / A type of vitreous pottery similar to stoneware

Articles made of iron, as household utensils, tools, and the like.

(uncountable) Anything made wholly or largely of iron, especially when used for decoration. / (countable, dated) An ironworks.

Characterized by or constituting (any kind of) irony. / Given to the use of irony; sarcastic. / (obsolete) Feigning ignorance; simulating lack of instruction or knowledge; exhibiting Socratic irony.

a supposed test for witchcraft in which a hot iron was applied to the skin (or the tongue) - the skin of a witch would be unharmed