(geometry, non-Euclidean geometry) The amount by which the total of the interior angles of a triangle is less than 180° (π radians); the amount by which the total of the internal angles of a polygon is less than what would be expected on the Euclidean plane.

plural of angular defect

plural of defective matrix

(linear algebra) A square (n×n) matrix that has fewer than n linearly independent eigenvectors, and is therefore not diagonalisable.

plural of mass defect

present participle of re-defect

simple past tense and past participle of re-defect

Alternative form of redefect

Third-person singular simple present indicative form of re-defect

(crystallography) A type of point defect in crystalline solids, occurring when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location.