Sentence:  When you buy breast halves, you may find a long, thicker piece on one side; it is called the <WSD>chicken tender</WSD>. In today's markets, tenders are often sold separately. But if you do find breasts with tenders intact, you may want to pull them off (the breast will cook more evenly), wrap airtight and freeze until tou have enough to make a meal. 
Meaning of the word marked with <WSD> tags:  A flap of chicken meat found on, and easily detached from, the breast.