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 [kah-ri´nah] (pl. cari´nae) (L.)
a ridgelike structure.
carina tra´cheae a downward and backward projection of the lowest tracheal cartilage, forming a ridge between the openings of the right and left principal bronchi.
carina urethra´lis vagi´nae the column of rugae in the lower anterior wall of the vagina, immediately below the urethra.


, pl.


(kă-rī'nă, -rī'nē),
1. In humans, a term applied or applicable to several anatomic structures forming a projecting central ridge.
2. That portion of the sternum in a bird, bat, or mole that serves as the origin of the pectoral muscles; it is not found in flightless birds or in most mammals.
[L. the keel of a boat]


(kə-rī′nə, -rē′-)
n. pl. cari·nae (-nē)
A keel-shaped ridge or structure, such as that on the breastbone of a bird or of the fused lower two petals of flowers of many members of the pea family.


,pl. carinae (kă-rī'nă, -nē)
A term applied to anatomic structures forming a projecting central ridge.
[L. the keel of a boat]


(ka-ri'na) plural.carinae [L., keel of a boat]
A structure with a projecting central ridge.

carina nasi

The nasal carina.

nasal carina

Olfactory nasal sulcus.
Enlarge picture
CARINA OF THE TRACHEA: seen bronchoscopically

carina of the trachea

The ridge at the lower end of the trachea separating the openings of the two primary bronchi.
See: illustration

carina tracheae

The carina of the trachea.

carina of the urethra

The ridge extending posteriorly from the urethral orifice and continuous with the anterior column of the vagina.

carina urethralis

The carina of the urethra.


Any keel-shaped ridge in the body, especially the ridge formed where the TRACHEA divides into the two bronchi.




  1. the keel-shaped edge of a leguminous flower, consisting of two fused lower petals. This may have a role in pollination, acting, for example, as a landing platform for bees.
  2. the breast-bone of a bird.
References in periodicals archive ?
Tergites: Tergites I-VI, surfaces smooth; VII with paired submedian carinae and lateral carinae; paired submedian carinae are restricted to posterior third of segment, and lateral carinae are restricted to posterior half; intercarinal surfaces smooth.
The Great Eruption temporarily promoted Eta Carinae to the second brightest star visible in our nighttime sky, vasty outshining the energy output every other star in the Milky Way, after which the star faded from naked eye visibility.
Based on their findings, the researchers explain that Eta Carinae generates high-energy x-rays and gamma rays when the two stars stellar winds collide.
Prothorax: Pronotum with hind angles abruptly divergent, not truncate dorsally; length of sublateral longitudinal carinae 0.5 times distance from base of carinae to side margin.
Mesonotum parallel-sided, as long as mesofemora, median and lateral longitudinal carinae distinct, posterolateral margins elevated.
-- Pronotum not smooth having rudimentary lateral carinae (Fig.
Propodeal carinae short, parallel; much of the transverse area between them smooth.
Pronotum black, except for the yellow paranota, lateral carinae, and the apex of the posterior pronotal cyst.
Pro-, meso-, and metaterga widest near mid-point, protergum longer and wider than meso- and metaterga combined, meso- and metaterga sub-equal in length; protergum with distinct marginal antero- and postero-transverse carinae, prescutum narrow weakly, developed medially, meso- and metaterga with distinct anterotransverse and posterotransverse carinae, each prescutum with an additional carina; terga sparsely populated with small sensilla; spiracular openings present in membranous pleural area below the acute anterolateral boundary of the mesotergum.
The most famous example is Eta Carinae, a star 7,500 light-years from Earth which, for a brief time in the mid-1800s, unleashed into space a shell of gas 10 times the mass of the sun and became the second-brightest star in the night sky.
In Kokkocynips, tarsal claws are simple, without basal lobe, the prominent part of the ventral spine of the hypopygium 3.0-3.3 times longer than broad, the head is transverse in front view, broader than high, the length of antennae nearly equal to length of head+mesosoma, F2 and subsequent flagellomeres are stout, short, F1 2.0 times longer than F2, lateral propodeal carinae toward distal part of propodeum gradually curved outwards, the central propodeal and lateral propodeal areas dull rugose; all tergites uniformly reticulate, 2nd metasomal tergite with sparse lateral hairs, induce rounded detachbale soft unilocular twig galls.