culm /ˈkʌlm/
草稈,莖,竹莖,灰煤
Culm n. Bot. The stalk or stem of grain and grasses (including the bamboo), jointed and usually hollow.
Culm, n. Min. (a) Mineral coal that is not bituminous; anthracite, especially when found in small masses. (b) The waste of the Pennsylvania anthracite mines, consisting of fine coal, dust, etc., and used as fuel.
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culm
n : stem of plants of the Gramineae