Headquarters

• installation from which a military force initiates operations

• a terrorist network intensely opposed to the United States that dispenses money and logistical support and training to a wide variety of radical Islamic terrorist groups; has cells in more than 50 countries

• lowest support of a structure

• a place that the runner must touch before scoring

• the bottom or lowest part

• (anatomy) the part of an organ nearest its point of attachment

• a lower limit

• the fundamental assumptions from which something is begun or developed or calculated or explained

• a support or foundation

• a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)

• any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water

• the bottom side of a geometric figure from which the altitude can be constructed

• the most important or necessary part of something

• (numeration system) the positive integer that is equivalent to one in the next higher counting place

• the place where you are stationed and from which missions start and end

• (linguistics) the form of a word after all affixes are removed

• the stock of basic facilities and capital equipment needed for the functioning of a country or area

• the principal ingredient of a mixture

• a flat bottom on which something is intended to sit

• (electronics) the part of a transistor that separates the emitter from the collector

• serving as or forming a base

• of low birth or station (`base' is archaic in this sense)

• (used of metals) consisting of or alloyed with inferior metal

• not adhering to ethical or moral principles

• having or showing an ignoble lack of honor or morality

• illegitimate

• debased; not genuine

• use as a basis for; found on

• situate as a center of operations

• use (purified cocaine) by burning it and inhaling the fumes