noun, plural bi·os.

  1. biography.
  2. biology.


  1. biographical.
  2. biological: a bio control service using praying mantises to reduce the population of garden pests.

  1. a combining form meaning “life” occurring in loanwords from Greek (biography); on this model, used in the formation of compound words (bioluminescence).

noun plural bios

  1. short for biography

combining form

  1. indicating or involving life or living organismsbiogenesis; biolysis
  2. indicating a human life or careerbiography; biopic

short for biography, attested from 1961.

word-forming element, from Greek bio-, comb. form of bios “one’s life, course or way of living, lifetime” (as opposed to zoe “animal life, organic life”), from PIE root *gweie- “to live” (cf. Sanskrit jivah “alive, living;” Old English cwic “alive;” Latin vivus “living, alive,” vita “life;” Middle Persian zhiwak “alive;” Old Church Slavonic zivo “to live;” Lithuanian gyvas “living, alive;” Old Irish bethu “life,” bith “age;” Welsh byd “world”). Equivalent of Latin vita. The correct usage is that in biography, but in modern science it has been extended to mean “organic life.”


  1. Life; living organism:biology.
  2. Biology; biological:biophysics.

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