ZO- Meaning of ZO- in English [zo-] or zoo- comb form [Gk zoi-, zoio-, fr. zoion; akin to Gk zoe life--more at quick] 1: animal: animal kingdom or kind "zooid" "zoology" 2: motile "zoospore" Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012