a member of the Union Army during the American Civil War
national; especially in reference to the government of the United States as distinct from that of its member units; "the Federal Bureau of Investigation"; "federal courts"; "the federal highway program"; "federal property"
characterized by or constituting a form of government in which power is divided between one central and several regional authorities; "a federal system like that of the United States"; "federal governments often evolved out of confederations"
of or relating to the central government of a federation; "a federal district is one set aside as the seat of the national government"
the filtration of a liquid for extraction or purification
the act of making coffee in a percolator
the slow passage of a liquid through a filtering medium; "the percolation of rainwater through the soil"; "the infiltration of seawater through the lava"
the successful action of solving a problem; "the solution took three hours"
a method for solving a problem; "the easy solution is to look it up in the handbook"
a statement that solves a problem or explains how to solve the problem; "they were trying to find a peaceful solution"; "the answers were in the back of the book"; "he computed the result to four decimal places"
the set of values that give a true statement when substituted into an equation
a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"