plural of column inch

(anatomy, dated) The anterior corticospinal tract.

(geology) a cloud of ash emitted during a volcanic eruption

(environmental sciences, hydrology) A notional column of water from the surface to the bottom in a natural setting, notable for the differences in physical and chemical properties at various depths.

plural of eruption column

hypercolumn

(linear algebra) An n×1 matrix that represents a vector.

A glowing region in a glow discharge between the Faraday dark space and the anode glow.

plural of positive column

A half column.