The Collaborative International Dictionary
Gopher wood \Go"pher wood`\ [Heb. g[=o]pher.]
A species of wood used in the construction of Noah's ark.
--Gen. vi. 14.
Wiktionary
n. The wood used in the construction of Noah's Ark - not yet identified
Wikipedia
Gopher wood or gopherwood is a term used once in the Bible for the substance from which Noah's ark was built. Genesis 6:14 states that Noah was to build the Ark of gofer, more commonly gopher wood, a word not otherwise known in the Bible or in Hebrew. Although some English Bibles attempt a translation, older English translations, including the King James Version (17th century), leave it untranslated. The word is unrelated to the name of the North American animal, the gopher.
Usage examples of "gopher wood".
It was, I knew, a relic of Atlantis made of gopher wood, inlaid with ivory, and carved with the figures of fanciful creatures with the heads and forequarters of bulls and the hindquarters of sea serpents.
It is made of 4,000-year-old gopher wood and sealed with crude pitch.
It's raining so hard maybe we need gopher wood and plans for an ark.