Part Holonyms:cone cone cell retinal cone
Hypernyms:photopigment
Inherited Hypernyms:iodopsinphotopigmentpigmentcoloring materialmaterialsubstancematterphysical entityentity
Inherited Hypernyms:iodopsinphotopigmentpigmentcoloring materialmaterialsubstancepartrelationabstractionentity
Substance Meronyms:opsin