1. the base of a cliff; the base of a lamp. 2. The part of an animal or plant organ nearest its point of attachment. 3. a skyscraper built on a base of solid rock. 4. the nation's industrial base. 5. The fundamental principle or underlying concept of a system or theory; a basis. 6. a paint with an oil base. 7. The fact, observation, or premise from which a reasoning process is begun. 8. A starting point, safety area, or goal. 9. Any one of the four corners of an infield, marked by a bag or plate, that must be touched by a runner before a run can be scored. 10. A center of organization, supply, or activity; a headquarters. 11. A fortified center of operations. 12. A supply center for a large force of military personnel. 13. the base of a column. 14. The lower part of a shield. 15. A morpheme or morphemes regarded as a form to which affixes or other bases may be added. 16. The side or face of a geometric figure to which an altitude is or is thought to be drawn. 17. The number that is raised to various powers to generate the principal counting units of a number system. 18. The number raised to the logarithm of a designated number in order to produce that designated number. 19. A line used as a reference for measurement or computations. 20. Any of a large class of compounds, including the hydroxides and oxides of metals, having a bitter taste, a slippery solution, the ability to turn litmus blue, and the ability to react with acids to form salts. 21. A molecular or ionic substance capable of combining with a proton to form a new substance. 22. A substance that provides a pair of electrons for a covalent bond with an acid. 23. The region in a transistor between the emitter and the collector. 24. The electrode attached to this region. 25. One of the purines (adenine and guanine) or pyrimidines (cystosine, thymine, and uracil) that occurs attached to the sugar component of DNA or RNA. 26. a base layer of soil. 27. a base camp for the mountain climbers. 28. based the new company in Portland. 29. based her conclusions on the report; a film based on a best-selling novel. 30. troops based in the Middle East. 31. Badly mistaken.
