carinas

/K ER0 IY1 N AH0 Z/
noun
  1. 1

    A longitudinal ridge or projection like the keel of a boat.

  2. 2

    Part of a papilionaceous flower consisting of two petals, commonly united, which encloses the organs of fructification.

  3. 3

    The keel of the breastbone of birds.

  4. 4

    Any of several features that have a projecting central ridge

Source: https://en.wiktionary.org/wiki/carina, https://en.wiktionary.org/wiki/carinas