from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Containing four replaceable hydrogen atoms in a molecule. Used of acids.
- adj. Containing four univalent basic atoms or radicals. Used of bases or salts.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. containing four replaceable hydrogen atoms
- adj. having four atoms of a univalent metal
from the GNU version of the Collaborative International Dictionary of English
- adj. Capable of neutralizing four molecules of a monacid base; having four hydrogen atoms capable of replacement by bases; quadribasic; -- said of certain acids; thus, normal silicic acid, Si(OH)4, is a tetrabasic acid.
from The Century Dictionary and Cyclopedia
- In chem.: Noting an acid which contains four atoms of hydrogen replaceable by more electropositive elements or radicals, as pyrophosphoric acid, H4P2O7.
- Noting a salt which contains electropositive elements or radicals replacing four atoms of hydrogen.
Sorry, no etymologies found.