noun. considered ancient life forms that evolved separately from bacteria and blue-green algae.
- division Archaebacteria
Example sentences of the word archaebacteria
1. Noun, singular or mass
There are three different types of archaebacteria, and all make their home in extreme environments.
2. Noun, plural
Some archaebacteria, for example, live in near-boiling-hot thermal vents that would quickly kill most other living things.
3. Preposition or subordinating conjunction
The University of Miami Department of Biology calls archaebacteria some of the oldest of all living things.