[ pree-ad-mish-uhn ]

  1. (in a reciprocating engine) admission of steam or the like to the head of the cylinder near the end of the stroke, as to cushion the force of the stroke or to allow full pressure at the beginning of the return stroke.

Origin of preadmission

First recorded in 1885–90; pre- + admission

Words Nearby preadmission Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023