lu

noun1

1. •
   (historical) Synonym of route or circuit, an administrative division of imperial China.

noun3

1. •
   A matrix decomposition which writes a matrix as the product of a lower and upper triangular matrix, used in numerical analysis to solve systems of linear equations or find the inverse of a matrix.
2. •
   Initialism of livestock unit.
3. •
   (Philippines) Initialism of La Union: a province of the Ilocos Region, Philippines.