Strong's #2788: kithara (pronounced kith-ar'-ah)

of uncertain affinity; a lyre:--harp.

Thayer's Greek Lexicon:

́

kithara

1) a harp to which praises of God are sung in heaven

Part of Speech: noun feminine

Relation: of uncertain affinity

Usage:

This word is used 4 times:

 

1 Corinthians 14:7: "whether pipe or harp, except they give a distinction"
Revelation 5:8: "the Lamb, having every one of them harps, and golden vials"
Revelation 14:2: "harping with their harps:"
Revelation 15:2: "sea of glass, having the harps of God."