plural of second inversion

(music) a position of a chord when the third of the chord is the lowest note

plural of retrograde inversion

(meteorology) An atmospheric condition in which a cooler layer of air lies below a warmer layer of air that functions as a "ceiling" for the cooler layer, interfering with normal atmospheric circulation and trapping pollutants.

(physics) The creation of a system in which more atoms or molecules are in an excited state than in a ground state.

plural of circle inversion

(geometry, inversive geometry, for a given circle with centre O and radius r) A transformation that maps any point P ≠ O to the point P’ on the ray from O through P for which OP × OP’ = r², and which maps O to the point at infinity.

(geometry) The branch of geometry concerned with inversion transformations, specifically circle inversions in the Euclidean plane, but also as generalised in non-Euclidean and higher-dimensional spaces.

plural of nitrogen inversion

plural of population inversion