From the same as heydad; properly, an acclaim, i.e. A choir of singers -- thanksgiving.
see HEBREW heydad
H1960. huyyedoth
הֻיְּדוֺת noun feminine plural songs of praise; — Nehemiah 12:8; so Thes MV, but form strange and dubious; according to Ew§ 165 b abstract הֻיְּדוּת (many MSS.) praising; so Be Ke Öttli; Ol§ 220 reads infinitive הוֺדוֺת, so SS.