ste.a.ro.ther.mo’phi.lus. Gr. neut. n.stear, fat; Gr. fem. n.thermê, heat; N.L. adj.philus -a -um, friend, loving; from Gr. adj.philos -ê -on, loving; N.L. masc. adj.stearothermophilus, (presumably intended to mean) heat- and fat-loving
homotypic synonym, validly published under the ICNP
Bacillusstearothermophilus is the correct name if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Bacillus.