Carpintero \Car`pin*te"ro\ (k[add]r`p[-e]n*t[asl]"r[-o]), n. [Sp., a carpenter, a woodpecker.] A california woodpecker ({Melanerpes formicivorus)}, noted for its habit of inserting acorns in holes which it drills in trees. The acorns become infested by insect larv[ae], which, when grown, are extracted for food by the bird.