the large white larva of any of several species of moth and beetle of Australia, esp. of the moth genus Cossus, occurring in decaying wood and traditionally used as food by Aborigines.
Origin: 1890–95; < Adnyamadhanha (Australian Aboriginal language spoken around Lake Torrens, South Australia) wityati witchetty grub, perh. equiv. to v. base witya climb + varti grub, insect
[wich-uh-tee] 
