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 (pĭr′ə-tīt′) also pyr·rho·tine (-tīn′)
A brownish-bronze iron sulfide mineral, FeS, characterized by weak magnetic properties and used as an iron ore and in the manufacture of sulfuric acid. Also called magnetic pyrites.

[Alteration (influenced by -ite) of German Pyrrhotin, from Greek purrotēs, redness, from purros, fiery, from pūr, fire; see paəwr̥ in Indo-European roots.]
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Noun1.pyrrhotine - a brownish iron sulfide mineral (FeS) having weak magnetic propertiespyrrhotine - a brownish iron sulfide mineral (FeS) having weak magnetic properties
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
References in periodicals archive ?
Other minerals: According to EDS analyses apatite, pyrrhotine, and pyrite are virtually pure phases.
The source of the weak magnetic high is an occurrence of the magnetic graphitic phyllites with pyrrhotine.
Certaines fissures sont mineralisees et renferment de la galene, de la sphalerite, de la pyrrhotine, de la chalcopyrice, de la pyrice, de l'hematite, du quartz et des carbonates.