Strong's G5353 · Greek

φθόγγος

phthoggos · ftong'-gos

from 5350; utterance, i.e. a musical note (vocal or instrumental)

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 2 φθόγγος , -ου, ὁ ( φθέγγομαι ), [in LXX: Ps 18 (19):4 ( קַו ), Wi 19:18 * ;] a sound : Ro 10:18 (LXX) I Co 14:7 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain