costa ( synonym found)
Definition of costa:

°(anatomy) A rib.
°(biology) A riblike part of a plant or animal, such as a middle rib of a leaf or a thickened vein or the margin of an insect wing.
Definition of costa:

°(anatomy) A rib.
°(biology) A riblike part of a plant or animal, such as a middle rib of a leaf or a thickened vein or the margin of an insect wing.
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