Ma'anar ƙamus na "itacen caoutchouc" yana nufin itacen roba, wanda shine nau'in itacen da ba a taɓa gani ba wanda ya kasance na asali ga yankuna masu zafi na Kudancin Amirka. An san itacen da latex, wanda ake amfani da shi wajen kera kayayyakin roba. Kalmar "caoutchouc" ta samo asali ne daga yaren Quechua na kudancin Amirka, kuma yana nufin "itacen kuka" ko "itacen kuka" dangane da latex da ke fitowa daga bishiyar idan aka yanke shi.