Beau Abernathy and Marten Krijgsman calls one of Goliath's weapons on 1 Samuel 17:45 (Hebrew כידון, kydwn) a "scimitar."
Beau Abernathy and Marten Krijgsman, “Goliath,” in The Lexham Bible Dictionary, ed. John D. Berry (Bellingham, WA: Lexham Press, 2016), n.p., Logos Bible Software edition
[Goliaths] sword is of an Eastern style—the Hebrew term used (כידון, kydwn) suggests a scimitar