1. culm - Noun
2. Culm - Proper noun
The stalk or stem of grain and grasses (including the bamboo), jointed and usually hollow.
Mineral coal that is not bituminous; anthracite, especially when found in small masses.
The waste of the Pennsylvania anthracite mines, consisting of fine coal, dust, etc., and used as fuel.
Source: Webster's dictionaryHarvesting of bamboo is typically undertaken according to these cycles: 1) Lifecycle of the culm: As each individual culm goes through a 5– to 7-year lifecycle, culms are ideally allowed to reach this level of maturity prior to full capacity harvesting. Source: Internet
In the next year, the pulpy wall of each culm slowly hardens. Source: Internet
The shoot is now considered a fully mature culm. Source: Internet