The spelling of the word "elementary grannle" might seem confusing at first. However, if we break it down, we can understand it better. The word "elementary" is spelled as /ˌɛl əˈmɛn tɛr i/, while "grannle" is spelled as /ˈɡræn l/. When combined, the two words create a new term /ˌɛl əˈmɛn tɛr i ˈɡræn l/, which could refer to a basic, fundamental level of something. So, even though the spelling might seem unusual, it's easier to understand with phonetic transcriptions.
A particle of blood-dust, or hemoconia.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.