Dictionary
tet•ra•ba•sic
Pronunciation: (te"tru-bā'sik), [key]—
adj. Chem.
1. (of an acid) having four atoms of hydrogen replaceable by basic atoms or groups.
2. containing four basic atoms or groups having a valence of one.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.