The term 'Cycle Attachment' refers to two different types of attachments that can be added to a bicycle. The first is a UNI, which stands for Unicycle, and is a single wheel attachment that allows the rider to balance on one wheel. The second is a TRI, which stands for Tricycle, and is a three-wheeled attachment that provides more stability than a unicycle. Both of these attachments are popular among cyclists, as they provide an extra challenge and can help improve balance and coordination.