noun Microbiology.
  1. the totality of microorganisms and their collective genetic material present in or on the human body or in another environment: The wide diversity of species that make up the microbiome is hard to fathom.

Origin of microbiome

coined 2001 by Joshua Lederberg, American molecular biologist; micro(be) + biome
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for microbiome

Contemporary Examples of microbiome