stearothermophilus

Ancient Greek στέᾱρ (stéār, “fat”) +‎ -o- +‎ Ancient Greek θερμός (thermós, “hot”) +‎ -o- +‎ Ancient Greek φίλος (phílos, “dear”) +‎ -us

steārothermophilus (feminine steārothermophila, neuter steārothermophilum); first/second-declension adjective

1. (New Latin) A specific epithet for some bacteria associated with hot springs

• Used exclusively as a taxonomic epithet and thus normally in the nominative singular; other inflections may be theoretical or rarely found.

First/second-declension adjective.

• Bacillus stearothermophilus
• Geobacillus stearothermophilus