Erayga "hemimetabolic" waxa uu tilmaamayaa nooc ka mid ah metamorphosis ee cayayaanka, halkaas oo ay jiraan saddex marxaladood oo kala duwan oo koritaan ah: ukun, nayfis, iyo qaangaar. Cayayaanka hemimetabolous, marxaladda nymph kama duwana heerka qaangaarka sida ay uga duwan tahay cayayaanka ku dhaca metamorphosis dhamaystiran (holometabolous). Tani waxay ka dhigan tahay in nambarada cayayaanka hemimetabolous ay muuqaal ahaan iyo dabeecad ahaanba la mid yihiin cayayaanka qaangaarka ah marka loo eego cayayaanka holometabolous. Erayga "hemimetabolous" wuxuu ka yimid ereyada Giriigga "hemi," oo macneheedu yahay "nus," iyo "metabole," oo macneheedu yahay "isbeddel."