The anthrax bacillus is rod-shaped

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Rod-shaped describes the morphology of the anthrax bacterium. Bacillus anthracis is a large, straight rod, classically described as Gram-positive and spore-forming. In microbiology, the term bacillus signals a rod-shaped cell, while a coccobacillus denotes a very short oval rod and a spiral denotes corkscrew-shaped bacteria. So describing the anthrax bacillus as rod-shaped matches its true cellular form.