Beware of using Latin terms, unless you know what you are doing.
In fact, you know a lot of
Latin already from English:
Some words end in -us, like radius. Their plural is often in -i
(radii),
Some words end in -a, like vetebra. Their plural is often in -ae (vetebrae),
Some
words end in -um, like datum, and agendum. Their plural often ends in -a. You know these plurals better than the
singular (data, agenda),
So be careful in essays.
Balneum has
the plural balnea.
Therma has the plural thermae.
But it's best
just to use the forms you are really certain of.
