Definitions

1. noun

the stalks of a plant, especially a cereal or grass, after the seeds have been removed

“The farmer left the culm in the field to dry, preparing it for composting.”

2. noun

a hollow or conical spout or tube, especially one for carrying away water or other fluids

“The engineer designed a new culm to improve the drainage system in the city.”

3. noun

a coal seam, especially one exposed in a spoil heap or a tip

“The coal miners discovered a rich culm in the abandoned mine.”