rubbing
131Rongorongo — Infobox Writing system name = Rongorongo type = Undeciphered time = Time of creation unknown, most tablets lost or destroyed in the 1860s languages = Assumed to be Rapanui sample = Rongorongo Qr3 7 color.jpg iso15924 = RoroRongorongo… …
132Stridulation — is the act of producing sound by rubbing together certain body parts. This behavior is mostly associated with insects, but other animals are known to do this as well, such as a number of species of fishes, snakes and spiders. The mechanism is… …
