Physics. A substance having the property of conducting or permitting the passage of heat, electricity, or other form of energy: see conduct, v. 9c…

Of things: An apparatus, vessel, etc., used for collecting something (variously applied in technical use). So collector ring, collector shoe (see…

Technical senses. A saddle-shaped electrical conductor; spec. †a concave pad for applying to a limb that is to be electrically stimulated (obsolete)…

In various technical uses. (a) The angle between the plane through the lines of contact of the brushes or collectors of a dynamo or electric motor…

An electrically neutral point or conductor.

Of various English words. In form N (without point). Neutral: (a) on an electrical plug, etc. (cf. neutral, adj. 10c); (b) on the selector mechanism…