The spelling of "cone grannle" may seem confusing, but it can be easily explained with the International Phonetic Alphabet (IPA) phonetic transcription. The word "cone" is pronounced as /koʊn/, while "grannle" is pronounced as /ˈɡrændl/. When put together, the word "cone grannle" is pronounced as /koʊn ˈɡrændl/. This word may be difficult to pronounce at first, but with practice, it will become easier. Proper spelling and pronunciation can help to avoid confusion in communication.
Nucleus of a retinal cell connecting with one of the cones.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.