Cūlm, n.

n. 1. [Lat. culmus, stalk, stem.] (Bot.) The stalk or stem of corn and grasses, usually jointed and hollow. 2. [W. cælm, knot or tie, applied to this species of coal, which is much found in balls or knots in some parts of Wales.] (Min.) Mineral coal that is not bituminous; anthracite coal, especially when found in small masses; glance-coal. Dana.