The word "ambomalleal" is not a commonly used word, but it is spelled phonetically. The IPA transcription for this word is /æmboʊməliəl/. The "ambo" part refers to an elevated platform or pulpit in a church. "Malleal" refers to the malleus, which is a small bone in the middle ear. Therefore, "ambomalleal" most likely refers to something related to the elevated platform in the church and the malleus bone. While the word may be rare in usage, it is spelled in accordance with its meaning.
Relating to the ambos, or incus, and the malleus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.