[‘ Likely or able to destroy the world.']
Etymology: < classical Latin /mundus/ world (see mundane adj.) + -cidious (in homicidious adj., parricidious adj.).
/Obs./ /rare/.
Likely or able to destroy the world.
1647 N. Ward /Simple Cobler Aggawam/ (ed. 3) 20 A vacuum and an exorbitancy are mundicidious evils.