Any blood vessel, whether artery or vein, is vena in Latin.
Vena will also do for a vein of ore.
The Binomial Name
scientists use latin terms to name an object.
In Latin terms: Orlando means "bright-sun" In German terms: It means "from the famous land"
Jugular vein
vertebral vein, , brachiocephalic vein
"Macaca fuscata" is scientific name for the Japanese macaque or "snow monkey". Such names follow Latin rules for their formation, but often contain terms that would have been unknown to any speaker of Latin.
Renal vein ( latin: vena renalis)
If you are asking "why are legal terms in Latin?" it is because at one time all educated people were taught Latin and consequently, lawyers could understand these terms, just as doctors could understand the Latin anatomical terms. Now, we keep them in Latin because of tradition.
A large majority of the words are greek and latin. As for who started using them...the name Hipocrates comes to mind although I am not for sure on that.
Luna is the Latin name for moon. It is also the root for all terms with lunar.
The word "terrible" does not originate from any Latin terms. The Latin term for one may be looking for is the Latin word "atrox." This word is the Latin for terrible, horror, and cruel.
The central vein can be called a midrib or mid-vein