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bacteria

Term: bacteria

Origin:  βακτήριον/bacterion(=bacterium) > βακτηρία/bacteria (=rod, stick) because  the first ones observed were rod-shaped.

Ehrenberg Collection drawings
Coined: in 1838 by German naturalist zoologist Christian Goofried Ehrenberg (1795-1876) who who was the first to systematically study the microscopic world of protozoa, microalgae and bacteria, and who founded the science of micropaleontology.
Definition:
of single-celled, prokaryote microorganisms with a wide range of shapes, ranging from rods to spheres  and spirals
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