capillitium /kap-i-lishˈi-əm/ noun

A mass of threads

capillary action noun

The force that causes a liquid in contact with a solid to rise (as in a capillary tube), or to spread (as through blotting-paper), caused by surface tension

capillary electrometer noun

An electrolytic cell, consisting of a capillary tube joining two electrodes that contain mercury, used as a measuring device for small voltages

capillary joint noun

A plumbing joint in which the ends of two pipes are inserted into either end of a marginally wider piece of piping and soldered in

capillary matting noun

Highly absorbent matting made of fine filaments, used in watering greenhouse, etc plants

capillary tube noun

A glass tube with a fine bore used in medicine, thermometers, etc