noun
Technical term used in mathematics, physics, geology, and other sciences to describe a lack of continuity or a break in a sequence, surface, or function.
この関数は x=0 で不連続性を示す。
This function exhibits a discontinuity at x=0.
地層の不連続性が地震の原因を説明する手がかりとなる。
Discontinuities in the strata provide clues to explain the cause of earthquakes.
Compound of 不 (fu, 'not') + 連続 (renzoku, 'continuity') + 性 (sei, '-ness, property'). The word is a modern technical coinage, likely calqued from Western scientific terminology.