eubacteria (noun)

1. In the anime series 'Cells at Work!', eubacteria are depicted as diligent workers in the human body.

2. In the science fiction novel, the protagonist encounters a deadly strain of eubacteria that threatens humanity.

3. Eubacteria are mentioned in ancient religious texts as one of God's creations.

4. The discovery of eubacteria by Antonie van Leeuwenhoek in the 17th century revolutionized the field of microbiology.