Definition of culms:
(n) :
Waste coal, used as a poor quality fuel.
(n) :
The spoils from which such low-quality coal can be retrieved.
(n) :
Anthracite, especially when found in small masses.
(n) :
(botany) The stem of a plant, especially of grass or sedge.
(n) :
A river in Devon, England, which joins the River Exe near Stoke Canon.
(n) :
A German bishopric, founded in 1234.