Definition of "carinae"

Both upper and lower crowns have carinae fore and aft but are otherwise smooth and remarkably stout (Fig. 2 E).

2001 November 16, Paul C. Sereno et al., “The Giant Crocodyliform Sarcosuchus from the Cretaceous of Africa”, in Science‎, volume 294, number 5546, pages 1516–1519

The teeth are devoid of carinae, lacking any kind of ornamentation.

1997 June 6, Jose L. Sanz et al., “A Nestling Bird from the Lower Cretaceous of Spain: Implications for Avian Skull and Neck Evolution”, in Science‎, volume 276, number 5318, pages 1543–1546

Yellow; the antennae fuscous above, also a fuscous cloud at the apex of the anterior wings, the wings hyaline with the nervures black; a spot on the scape within, and three longitudinal stripes on the mesothorax, black; the latter slightly punctured anteriorly; the metathorax smooth and shining, with three oblique carinae on each side, and a small subovate enclosed space in the middle of the disk.

1859, Various, Journal of the Proceedings of the Linnean Society - Vol. 3‎