Strong G9018ῥάχις

a spine

Transliteration
rhachis
Morphology
Greek Noun (Feminine)

Definition

1. the lower part of the back, the chine , (Iliad by Homer): then, the spine or backbone , ὑπὸ ῥάχιν παγῆναι to be impaled, (Aeschulus Tragicus)
2. anything ridged like the backbone, a mountain-ridge , (Herdotus Historicus) (ML)