Meaning

noun (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work

noun the quality of lacking any predictable order or plan

originEtymology tree Proto-Indo-European *h₃er- Proto-Indo-European *h₃reyH-der. Proto-Germanic *rinnaną Proto-West Germanic *rinnan Frankish *randijubor. Old French randirder. Old French randonbor. Middle English randoun English randon English random Proto-Germanic *-in- Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European…

Etymology from Wiktionary, CC BY-SA 3.0