From Longman Dictionary of Contemporary Englishtenderlointen‧der‧loin /ˈtendəlɔɪn $ -ər-/ noun [uncountable] DFCmeat that is soft and easy to eat, cut from each side of the backbone of cows or pigs
Examples from the Corpus
tenderloin• I know how you enjoy a tenderloin.• Puny would spend Thursday baking bread and a cake, and he would roast a tenderloin and do the potatoes.• The saddle and tenderloin can also sometimes be found, and they provide very succulent meat.• broiled beef tenderloin 