noun, plural por·ter·hous·es [pawr-ter-hou-siz, pohr- for 1; pawr-ter-hou-ziz, pohr- for 2] /ˈpɔr tərˌhaʊ sɪz, ˈpoʊr- for 1; ˈpɔr tərˌhaʊ zɪz, ˈpoʊr- for 2/.
Examples from the Web for porterhouse
There is a porterhouse steak, broiled rare, and some green young onions.The Story of Mary MacLane|Mary MacLane
Porterhouse steak, an American term for a steak which contains a small bone.The Slang Dictionary|John Camden Hotten
For example, the housewife may ask for an inch-thick sirloin steak, a 2-inch porterhouse steak, and so on.Woman's Institute Library of Cookery, Vol. 3|Woman's Institute of Domestic Arts and Sciences
Season a four pound Porterhouse steak with salt and pepper, roll it in oil, and broil.The Hotel St. Francis Cook Book|Victor Hirtzler
I cooked it in as neat as you please in your half the porterhouse.When God Laughs and Other Stories|Jack London