Strong's Greek Concordance

G4555: σάρδινος

sárdinos · “gem”

Definition

sardine (G3037 (λίθος) being implied), i.e. a gem, so called

KJV translates it as: sardine

Word origin: from the same as G4556 (σάρδιος);

σάρδινος, -ου, ὁ
= σάρδιον (which see), Rev.4:3, Rec.†
(AS)

Abbott-Smith Manual Greek Lexicon (1922) via STEPBible TBESG (CC BY 4.0).