costaPronunciation: /ˈkɒstə/Definition of costa noun (plural costae /ˈkɒstiː/) Botany & Zoology a rib, midrib, or rib-like structure. Entomology the main vein running along the leading edge of an insect’s wing. Origin: mid 19th century: from Latincosta in other Oxford dictionaries Definition of costa in the US English dictionary
