糸状体
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Meanings
1
filament; protonema; trichome
Biological term for a thread-like structure, especially in plants, algae, or fungi. Protonema is the early filamentous stage of mosses; trichome refers to hair-like outgrowths on plants.
The protonema of mosses is the first structure formed after spore germination.
Trichomes on the leaf surface protect the plant from drying out.
2
mitochondria
Rare or obsolete synonym for ミトコンドリア. The cross-reference suggests this usage is not standard; modern biology uses ミトコンドリア.
See also: ミトコンドリア
In older literature, 糸状体 can refer to mitochondria.