from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. (of an acid) containing five replaceable hydrogen atoms
- adj. (of a salt) having five atoms of a univalent metal
from the GNU version of the Collaborative International Dictionary of English
- adj. Capable of uniting with five molecules of a monacid base; having five acid hydrogen atoms capable of substitution by a basic radical; -- said of certain acids.
from The Century Dictionary and Cyclopedia
- Noting an acid containing five atoms of hydrogen readily replaceable by metals or electropositive radicals.
Sorry, no etymologies found.