A word I have to keep looking up.
entropy
n.
5Ger entropie, arbitrary use (by R. J. E. Clausius, 1822-88, Ger physicist) of Gr entropc, a turning toward, as if < Ger en(ergie), ENERGY + Gr tropc, a turning: see TROPE6
1 a thermodynamic measure of the amount of energy unavailable for useful work in a system undergoing change
2 a measure of the degree of disorder in a substance or a system: entropy always increases and available energy diminishes in a closed system, as the universe
3 in information theory, a measure of the information content of a message evaluated as to its uncertainty
en[trop$ic 73tr9p4ik8
adj.