installation from which a military force initiates operations

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