propagator

/ˈprɑpəɡeɪtər/
noun
  1. A person who spreads and promotes an idea, belief, or piece of information.
    • The propagator of the conspiracy theory refused to provide evidence.
    • He was a leading propagator of the new educational reform.
    • She became a propagator of healthy eating habits in her community.
  2. A person or thing that breeds or reproduces plants or animals.
    • The nursery employs a skilled propagator who specializes in orchids.
    • The farmer acted as a propagator, carefully breeding the best livestock.
    • This greenhouse is a propagator for rare tropical plants.
  3. A device or container used to help seeds or cuttings grow, often by providing controlled warmth and moisture.
    • She placed the seeds in a heated propagator to speed up germination.
    • The propagator kept the soil warm and damp for the young seedlings.
    • You can buy a simple propagator at any garden supply store.