the blood group whose red cells carry the A antigen | a support or foundation |
the 1st letter of the Roman alphabet | lowest support of a structure |
the basic unit of electric current adopted under the Systeme International d'Unites | a place that the runner must touch before scoring |
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation | (electronics) the part of a transistor that separates the emitter from the collector |
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes | installation from which a military force initiates operations |
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) | a flat bottom on which something is intended to sit |
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | the stock of basic facilities and capital equipment needed for the functioning of a country or area |
| 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) |