Meo or Meos may refer to:
MenuetOS, or MeOS, an operating system Microsomal ethanol oxidizing system, an alternate ethanol metabolic pathway mEos, a variant of the photoactivatable fluorescent protein Eos Märt Meos (1881–1966), Estonian educator and politician Mati Meos (born 1946), Estonian engineer and politician
See also Meo (disambiguation)