дежурный

Etymology
of with.

Adjective

 * 1) on duty
 * 2) standing
 * 3) open extra hours
 * 4) on call. For example, дежурный пульмонолог = the on call pulmonologist
 * 1) on call. For example, дежурный пульмонолог = the on call pulmonologist

Noun

 * 1) person on duty
 * 2) on call. For example, дежурный пульмонолог = the on call pulmonologist