Bot. a threadlike growth in mosses, arising from a spore and developing small buds that grow into leafy moss plants
Origin of protonemaModern Latin ; from Classical Greek pr?to-, proto- + n?ma (gen. n?matos), thread
The filamentous growth that arises following spore germination in liverworts and mosses and develops into a mature gametophyte.
Origin of protonemaproto– + Greek n&emacron;ma, thread; see (s)n&emacron;- in Indo-European roots.
- pro′to·ne′mal , pro′to·ne′ma·tal