1. spreading act of extending over a wider scope or expanse of space or time
  2. spreading factor an enzyme (trade name Hyazyme) that splits hyaluronic acid and so lowers its viscosity and increases the permeability of connective tissue and the absorption of fluids
  3. spreading fleabane well-branched plant with hairy leaves and stems each with a solitary flower head with narrow white or pink or lavender rays; western North America
  4. spreading bellflower European perennial bellflower that grows in clumps with spreading stems and blue or white flowers
  5. spreading dogbane North American perennial having pinkish flowers in loose cymes; used in folk medicine for pain or inflammation in joints
  6. spreading pogonia orchid of northeastern United States with magenta-pink flowers having funnel-shaped lip; sometimes placed in genus Pogonia