Ma'anar ƙamus na kalmar "calyptra" kalma ce ta botanical da ke nufin wani tsari mai kama da kaho ko hula wanda ke rufewa da kuma kare haɓakar spore- bearing capsule na wasu mosses ko liverworts. Ana kuma kiransa "rufin kambun gansakuka" ko "operculum." A cikin ilimin dabbobi, ana kuma amfani da kalmar don bayyana wani tsari a wasu katantanwa da ke rufe buɗewar harsashi.
