tithonicity

== English == === Etymology === From tithonic +‎ -ity. === Noun === tithonicity (uncountable) (chemistry, physics, dated) The state or property of being tithonic; actinism. === References === “tithonicity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.