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| acid |
in chemistry, any of a group of substances that usu. dissolve in water, have a sour taste, and form salts in reaction with bases. (Cf. base.) [1/6 definitions] |
| alkaloid |
any of various nitrogen-containing organic bases found in plants and from which drugs such as nicotine, quinine, and morphine are made. |
| baseball |
a game played with a bat and ball by two teams of nine players each, the object being to score runs by advancing runners around four bases. [1/2 definitions] |
| cyclone fence |
a strong chain-link fence, usu. high and topped with barbed wire, used around military bases, prisons, and the like. |
| diamond |
a baseball field, or the part of it having the four bases and base paths. [1/7 definitions] |
| first base |
in counterclockwise order from home plate, the first of three bases marking the infield of a baseball diamond. [1/2 definitions] |
| foul |
in baseball, a ball hit to outside the lines drawn from the rear of the homeplate to the first and third bases; foul ball. [1/21 definitions] |
| foul line |
in baseball, either of the lines extending from home plate through first and third bases to the limits of the outfield. [1/3 definitions] |
| home run |
in baseball, a hit that allows the batter enough time to touch all four bases in succession and score a run. |
| hydroxyl |
of a chemical group containing one atom each of hydrogen and oxygen, found in some bases, acids, and alcohols. |
| purine |
any of several derivatives of this substance, esp. the bases that compose nucleic acids such as adenine and guanine. [1/2 definitions] |
| pyrimidine |
an organic compound that is the fundamental form of certain bases that are constituents of nucleic acids. [2 definitions] |
| relativism |
the philosophical theory that all bases of judgment are relative to time, place, or situation. |
| rundown |
a baseball play in which a runner is put out when caught between bases. [1/2 definitions] |
| second base |
in baseball, the second of four bases, located behind the pitcher's mound and opposite home plate. [1/2 definitions] |
| sycamore |
any of a group of tall trees bearing leaves with hollow leafstalk bases and flowers in balls, esp. the American plane tree or buttonwood. [1/3 definitions] |
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