IPA: /kʌlm/
KK: /kʌlm/
The stem of a grass or similar plant, or a type of waste material from anthracite coal mining that includes fine coal and dirt.
The culm from the coal mine was used to fill in the low areas of the field.
Culm originates from Old English 'culm', meaning coal or a type of coal. It refers specifically to a type of coal or the residue left after burning.
Think of 'culm' as a type of coal, which helps you remember that it refers to a specific kind of coal or its remnants.