álgebra

Etymology
From, through.

Noun

 * 1) algebra
 * 2)  study of formal manipulations of equations, with the aim of solving certain problems or the equations themselves
 * 3)  set of unary and binary operations related to each other by certain properties
 * 4) compendium of this discipline
 * 5)  art of restoring dislocated bones

Etymology
From, used in the title of al-Khwarizmi’s influential work.

Noun

 * 1) algebra