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Webster 1913 Edition

Noun.

(Arch.)

An upward curve or very obtuse angle in the upper surface of any member, as of a timber laid horizontally; – the opposite of

camber

(Naut.)

See

(Geol.)

A ridge formed by tilted strata; hence, any ridge with a sharp summit, and steeply sloping sides.

hogback ‎(plural hogbacks)

(geology) A sharp steep-sided ridge formed by the erosion of tilting strata
- 1920, Peter B. Kyne, The Understanding Heart, Chapter IV
  Without further parley Garland rode off up the hog's-back and the sheriff rode off down it …
A hogframe.
A Viking grave marker taking the form of a recumbent monument, generally with a curved (hogbacked) ridge and outwardly curved sides.