say it: buh-SIL-uhs
bacillus is a noun meaning "aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil". It carries one recorded sense.
aerobic rod-shaped spore-producing bacterium; often occurring in chainlike formations; found primarily in soil
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for bacillus come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.