(rail transport) A bare wire conducting electricity, often the lower part of the catenary, which comes into contact with a raised pantograph or other form of current collector.

plural of contact wire

plural of contact shoe

(rail transport) A current collector on an electric train which is in contact with the live rail.

simple past tense and past participle of contact trace

Third-person singular simple present indicative form of contact trace

(epidemiology) To identify everyone with whom a person carrying an infectious disease has come into contact since contracting the disease.

(epidemiology) The process of identification of persons ("contacts") who may have come into contact with a person carrying an infectious disease.

present participle of contact trace

(of a delivery, exchange, etc., of physical goods) conducted without human-to-human contact so as to reduce the potential spread of a contagious disease.