22:21

In Psalm 22:21 is the Bible speaking of "unicorns"?

In Psalm 22:21 is the Bible speaking of "unicorns"?

I was reading Psalm 22 (from this question) and I found this verse:

Psalms 22:21 (KJV)
Save me from the lion’s mouth: for thou hast heard me from the horns of the unicorns.

When I switched translations I found “wild oxen” instead: