leath·er·back 
(lĕthər-băk′)
(lĕthər-băk′)n.
A very large sea turtle (Dermochelys coriacea) of tropical and subtropical waters worldwide, having a tough, leathery carapace with seven longitudinal ridges.
leatherbackDermochelys coriacea
- ultraconservatism
- ultraconservative
- ultradian
- ultrafiltration
- ultrahigh
- ultrahigh frequency
- ultraism
- ultraist
- ultraliberal
- ultralight
- ultralow frequency
- ultraluxe
- ultramafic
- ultramarathon
- ultramarathoner
- ultramarine
- ultramicrometer
- ultramicroscope
- ultramicroscopic
- ultramicroscopy
- ultramicrotome
- ultramicrotomy
- ultraminiature
- ultraminiaturization
- ultraminiaturize