The conspicuous signs of artery and vein damage brought on by chronic injection of drugs.

A lightweight shoe with spikes screwed into its bottom in order to maximize traction (and therefore performance) when running or jumping.

(sports) referring to track and field athletics.

(Internet) The use of code associated with a single pixel tag (invisible to the user) to monitor the activity of the user, especially his use of advertisements

A vehicle combining both wheels and treads (caterpillar tracks).

Describing such a vehicle; half-tracked

To monitor; to track or record; to understand or follow.

Used other than figuratively or idiomatically: see track, down. / (idiomatic) To hunt for or locate; to search for; to find.

A stripped-down, lightweight bicycle, with a fixed gear mechanism and no brakes, designed for racing on a velodrome.

(chiefly US) A group of athletic sports, consisting mainly of various kinds of running, jumping and throwing, that take place on a track and the enclosed field.