costa Syllabification: (cos·ta)Pronunciation: /ˈkästə/Definition of costa noun (plural costae /-tē, -tī/) Botany & Zoology a rib, midrib, or riblike 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 British & World English dictionary
