Syriac; Syriack; Syrian Tongue

Boyd’s Bible Dictionary:

The ancient language of Syria, an Aramean dialect
In Daniel 2:4, the word “Syriac” should read “Aramaic,” the court language of Babylon at the time.

Concise Bible Dictionary:

The language that was spoken in Syria was substantially the same as Chaldee. The Hebrew word is aramith. See ARAMAIC (2 Kings 18:26; Ezra 4:7; Isa. 36:11; Dan. 2:4).

Jackson’s Dictionary of Scripture Proper Names:

the Syrian tongue