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Noun: reactant  ree'ak-tunt
  1. A chemical substance that is present at the start of a chemical reaction

Derived forms: reactants

Type of: chemical, chemical substance

Encyclopedia: Reactant

Nearest

reach into
reach one's nostrils
reach out
reachable
reaching
reacquaint
reacquire
reacquired stock
react
reactance
reactant
reaction
reaction engine
reaction formation
reaction propulsion
reaction time
reaction turbine
reactionary
reactionism
reactionist
reaction-propulsion engine