pillwort
/ˈpɪlwɜːrt/
noun
- A small aquatic fern (Pilularia globulifera) that grows in shallow water or wet soil, with leaves that look like tiny green pills.
- The pond was full of pillwort, its round leaves floating on the surface.
- Pillwort is often found in muddy areas near lakes and streams.
- We learned about pillwort during our biology field trip to the wetlands.