Definition of costa in English:
costa
nounPlural costae ˈkɒstəˈkästə
Zoology Botany 1A rib, midrib, or riblike structure.
Example sentencesExamples
- The internal molds are smooth with exception of traces of the concentric costae on the rostral face.
- He differentiated his new species from S. robusta by its more numerous costae on the shell flanks.
- It has strong divaricate ornamentation of coarse costae and/or small plicae, which bear low, close nodes, but which cover both the anterior and posterior faces of the shell.
- Wall thickness is 10-26 m, becoming thicker at the corners of the chamber where it may bulge outwardly to produce coarse longitudinal costae.
- The main part of the shell is coarsely commarginally lamellose and lacks radial costae.
- 1.1Entomology The main vein running along the leading edge of an insect's wing.
Example sentencesExamples
- The forewings generally are reduced to the region immediately adjacent to the costa, having separated along the radius and cubitus veins.
- It resulted in outgrowths and duplications of the costa region of the wing.
Origin
Mid 19th century: from Latin.