The Latin word is: "quercus" source: http://www.latinwordfor.com/latin-word-for-oak-tree.html
quercia is latin for oak
quercus
A Turkey oak.
quercum
Oak.
A blackjack oak is a tree, Latin name Quercus marilandica.
"Black oak" is a literal English translation of "Quercus nigra."But that is not the particular kind of oak tree to which the Latin words are linked in science and in the real world. Instead, the Latin phrase is the scientific, Latin or binomial name for the water oak. Other common names include duck, orange, possum, punk or spotted oak.
Quercus.
Quercus laurifolia
The Black Oak has the Latin name Quercus velutina but the California Black Oak is called Quercus kelloggii.
Quercus sessilis is a literal Latin equivalent of the English phrase "sessile oak." The masculine singular phrase also translates literally as "sitting oak" in English. The pronunciation will be "KWER-koos SES-see-lees" in Church and classical Latin.