No, an encyclopedia is a secondary source.
secondary
Secondary source
It is a secondary source.
an newspaper article will be an secondary source
Magazine articles are secondary sources
is pericles primary source or secondary source
It is a good idea to confirm your data with a secondary source.
When it comes to the reliability of a secondary source you need to document your use of this source. You also need to not have an over-reliance on a secondary source.
Secondary Source.
In my personal opinion, it would be a second source,
secondary