Kalmar "iguanid" tana nufin wani dan gidan Iguanidae, wanda dangin kadangaru ne. Iguanidae babban iyali ne na kadangaru wanda ya haɗa da nau'ikan nau'ikan nau'ikan da aka fi sani da iguanas, waɗanda ke da alamun ciyawa ko ciyawa, wutsiyoyi masu tsayi, kuma galibi masu launin fata. Kalmar "iguanid" yawanci ana amfani da ita a cikin mahallin ilimin dabbobi da ilmin halitta don komawa ga kowane memba na iyalin Iguanidae, wanda ke cikin babban rukuni na dabbobi masu rarrafe da aka sani da squamates.