Find the word definition

Wiktionary
housane

n. (context organic compound English) a polycyclic alkane with the chemical formula C5H8.

Wikipedia
Housane

Housane is a saturated cycloalkane with the formula CH. It is a colorless volatile liquid. It was named "housane" because of its shape. Structurally, the molecule consists of cyclopropane fused to cyclobutane. The synthesis of molecules containing multiple strained rings, such as housane, is a traditional endeavor in synthetic organic chemistry. This compound is prepared in several steps starting with cyclopentadiene.