The term 'Amazon Icon' can be summarized by the crossword solution of CART, which is a four letter word. CART stands for 'Computer Assisted Retail Transaction', which is a type of technology used in retail stores to process customer payments. This technology is also used by Amazon to facilitate online shopping. The Amazon Icon is a symbol that appears on the checkout page of an Amazon store, indicating that the customer is using the CART system to make their purchase.