plural of palsywort

A chemical element (symbol Zr) with an atomic number of 40, a strong, lustrous, grey-white transition metal mainly used as a refractory and opacifier.

(informal, intransitive) To be promiscuous; to have multiple sexual partners.

(US, government, military, espionage, aerospace) Initialism of National Reconnaissance Office launch.. An NRO spacelaunch for delivering a high security government payload into space.