pression
/ˈprɛʃn/Now rare
noun
1The action of pressing; pressure; an instance of this.
2In Cartesian physics: pressure or impulse communicated to or propagated through a medium without imparting motion to the particles of the medium, formerly thought to be a possible mechanism for the transmission of light. Now historical.
Origin
Mid 16th century; earliest use found in Thomas Wyatt (c1503–1542), poet and ambassador. From classical Latin pressiōn-, pressiō pressure from press-, past participial stem of premere to press + -iō.