LATIN DICTIONARYLexicon Latīnum
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“iron” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

iron s.
ferrum: as adjective, ferreus (made of iron; PROP. and IMPROP.). An iron tool, ferramentum: a vein of iron, vena ferri: iron mine, metallum ferrarium or ferri; ferri fodina or ferraria (these, too, as pit): a plate of iron, lamina ferri: covered with an iron plate, lamina ferratus: iron wire, *filum ferreum: iron color, ferrugo: iron-works, fabrīcae ferrariae: iron filings, ramenta ferri; scobs ferri delimata: as hard as iron, ferreus, adamantinus, or perdurus (general term for very hard): an iron frame (i. e., body), corpus ferreum: a taste of iron, sapor ferrugineus: iron furnace, fornax ferraria: the dross of iron, scoria ferri: impregnated with iron [Vid: CHALYBEATE]. Prov. To strike whilst the iron is hot, utendum est animis, dum spe calent (Curt., 4, 1, 29); matūra, dum libido manet (Ter., Phorm., 4, 5, 14).
Irons [Vid: CHAINS].
Irons (surgical, for correcting distortions, etc.), serperastra (to straighten the leg, depravata crura corrigere).
IMPROPR., Made of iron, ferreus: I must have been made of iron, ferreus essem: Oh! thou iron- hearted man, O te ferreum!
iron v.
*vestes ferro calefacto premere.
Put in chains, Vid: CHAIN.

Quick answer

What is the Latin word for iron?
The usual Latin words for “iron” are ferrum, serperastra, ferreus; also ferrāmentum, ferō, ferrārius. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.