(Canada, engineering) The symbol of a Canadian engineer. A faceted stainless steel or iron ring worn on the little finger of the dominant hand, signifying a trained Canadian engineer, awarded in Canada after an accompanying oath of professional conduct, in a private ceremony with dramatic rites.

plural of cast-iron

plural of ductile iron

An automated machine that processes fish for canning.

plural of iron blue

(manufacturing, historical) A sheet iron coated with a blue-black layer of oxide.

(finance) A combination of four options, including two calls and two puts, that replicates the payoff of a butterfly.

(finance) A combination of four options, including both calls and puts, that yields the same payoff as a condor.

plural of iron condor

Weights as opposed to exercise machines.