外がい生せい菌きん根こん

noun

ectomycorrhiza

Technical term in botany for a symbiotic association between a fungus and the roots of a plant, where the fungus forms a sheath around the root.

• マツの根ねには外がい生せい菌きん根こんが形けい成せいされる。

  Ectomycorrhizae form on the roots of pine trees.