tetrol

from The Century Dictionary.

• noun In organic chemistry, a hypothetical hydrocarbon, C₄H₄, of which some derivatives are known.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule.
• noun [Obs.] furfuran.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry, especially in combination Any polyhydric alcohol having four hydroxyl groups