Definition: The projection of a mammary gland from which, on female mammals, milk is secreted.

Alright class, settle down, let’s take a look today, At a word that might seem a little bit gray. We have “nipples” in our dictionaries bright, Let's break it down with all of our might! The dictionary gives us a very precise plea, “The projection of a mammary gland, you see.” Now, let’s unpack this, nice and slow, So the meaning is crystal clear, you know. "Mammary glands," that's a key phrase to hold, They make the milk for babies, brave and bold! Think of a mother feeding her little one, That’s where these glands are working, ‘til day is done. “Projection” means they stick out from the skin, A small, rounded bump—where goodness begins! It's how milk flows outward, pure and free, A vital function for a mommy bee! So, nipples, my dears, are those little peaks, Connected to glands that nourish and speak. They’re part of biology, wonderfully true, Now does anyone have questions for you?