Kalmar "medusoid" sifa ce da ke nufin wani abu mai kama da medusa, wanda shine nau'in jellyfish. A cikin ilmin halitta, yana iya bayyana sifofi ko halittu masu kama da siffa ko tsari ga medusa, kamar wasu nau'ikan cnidarians (wani nau'in dabbar dabba wanda ya haɗa da jellyfish, murjani, da anemones na teku). Hakanan ana iya amfani da kalmar a misalta abubuwa masu kama da kamanni ko ɗabi'a ga medusa, kamar mutumin da yake da daji, gashi maras kyau wanda yayi kama da tanti na jellyfish.