microorganisma microscopic organism, especially a bacterium, virus, or fungusSoil microorganisms play a vital role in nutrient cycling and maintaining soil health.NoteSoil microorganisms play a vital role in nutrient cycling and maintaining soil health.Elon.io is an online learning platformWe have an entire course teaching IELTS Vocabulary — Band 7+ grammar and vocabulary.Start learning IELTS Vocabulary — Band 7+ now