Ma'anar ƙamus na kalmar "cultivar" nau'in shuka ne wanda aka samar da kuma kiyaye shi ta hanyar noma, yawanci ta hanyar zaɓin kiwo ko injiniyan kwayoyin halitta. Yawancin lokaci ana yin kiwo don takamaiman halaye kamar juriya na cuta, yawan amfanin ƙasa, ko ɗanɗano, kuma galibi ana yada su ta hanyar jima'i don kiyaye waɗannan halayen. Kalmar ta samo asali ne daga kalmomin “cultivated iri.”