👉 A limacon is a type of cloud that is formed when raindrops fall onto the ground and stick together. It is named after its shape, which resembles a crescent moon or a lighthouse. The term "limacon" comes from French, which means "ladder" in English. In mathematics, limacons are also known as limaçons or limacions. It's important to note that the definition of limacons can vary depending on the context and the specific use of