bacteria

bacterium

Popularity

500+ learners.

NOUN

(biology)-bacterium

Synonyms for bacteria

Random Word

Roll the dice and learn a new word now!

Get a Word

Want to Learn Spanish?

Spanish learning for everyone. For free.

Translation

The world’s largest Spanish dictionary

Conjugation

Conjugations for every Spanish verb

Vocabulary

Learn vocabulary faster

Grammar

Learn every rule and exception

Pronunciation

Native-speaker video pronunciations

Word of the Day

SpanishDictionary.com is the world's most popular Spanish-English dictionary, translation, and learning website.

Ver en español en inglés.com

FEATURES

ABOUT

SOCIAL NETWORKS

APPS

IXL Learning's Dictionary Media Group reaches over 500,000,000 learners each year.

French-English dictionary, translator, and learning

English dictionary and learning for Spanish speakers

English dictionary and learning for French speakers

Comprehensive resource for word definitions and usage

Essential reference for synonyms and antonyms

Comprehensive K-12 personalized learning

Adaptive learning for English vocabulary

Immersive learning for 25 languages

Marketplace for millions of educator-created resources

35,000+ worksheets, games, and lesson plans

Fun educational games for kids

Fast, easy, reliable language certification

Trusted tutors for 300+ subjects

Bite-sized daily word games

Playful tools to learn multiplication