a support or foundation | the blood group whose red cells carry the A antigen |
lowest support of a structure | the 1st letter of the Roman alphabet |
a place that the runner must touch before scoring | the basic unit of electric current adopted under the Systeme International d'Unites |
(electronics) the part of a transistor that separates the emitter from the collector | a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation |
installation from which a military force initiates operations | any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes |
a flat bottom on which something is intended to sit | one of the four nucleotides used in building DNA, also known as deoxyadenylate, or dAMP; all four nucleotides have a common phosphate group and a sugar (ribose) |
the stock of basic facilities and capital equipment needed for the functioning of a country or area | (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA |
the principal ingredient of a mixture | |
the fundamental assumptions from which something is begun or developed or calculated or explained | |
(linguistics) the form of a word after all affixes are removed | |
a lower limit | |
(anatomy) the part of an organ nearest its point of attachment | |
the place where you are stationed and from which missions start and end | |
the bottom or lowest part | |
(numeration system) the positive integer that is equivalent to one in the next higher counting place | |
the most important or necessary part of something | |
the bottom side of a geometric figure from which the altitude can be constructed | |
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water | |
a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) | |