The usual Old English word for cloud was weolcan. In Middle English, skie also originally meant cloud. The four fundamental types of cloud classification (cirrus, cumulus, stratus, nimbus) were proposed by British amateur meteorologist Luke Howard (1772-1864) in 1802. Figuratively, as something that casts a shadow, from early 15c.; hence under a cloud (c.1500).
Thanks for the A2A. Okay, the most famous song in the world is no doubt 'Happy Birthday', followed by various Christmas carols (since the majority of human population is Christian indeed and since Santa is a really famous guy), folk songs, army marches and national anthems.
Here is the list in full â Top 20 Most Recognizable Songs Of All Time: 1  Spice Girls â Wannabe: 2.29 seconds. 2  Lou Bega â Mambo No 5: 2.48 seconds. 3  Survivor â Eye of the Tiger: 2.62 seconds.  Lady Gaga â Just Dance: 2.66 1  seconds. ABBA â SOS: 2.73 seconds.  Roy Orbison â Pretty Woman: 2.73 1  seconds. Michael Jackson â Beat It: 2.80 seconds.