Meaning of costa

cos•ta

1. a rib or riblike part.
2. the midrib of a leaf in mosses.
3. a ridge.
1. Also calledcos&prim;tal vein&prim;.a vein, usually marginal, in the anterior portion of the wing of certain insects.
2. Also calledcos&prim;tal mar&prim;gin.the anterior edge or border of the wing of certain insects.