Definition: A fine fiber excreted by the silkworm or other arthropod (such as a spider).

Alright class, settle down and let’s take a peek, At this word ‘silk,’ so delicate and sleek! The dictionary gives us a clue, you see, “A fine fiber…excreted,” that’s quite the decree! Now listen close, it's not something we just find, It’s made by creatures, clever and refined. First, there are silkworms, soft and white and slow, They spin a thread, a wondrous, shimmering flow. They excrete this fiber, a gift they freely give, A beautiful material, for us to truly live! Spiders too, with webs so grand and bright, Create their own silk, a shimmering sight! So ‘silk’ means a thread, incredibly fine, Made by creatures – quite a design! Do you understand? Any questions you might pose? Let's explore this word, and watch your knowledge grow!