The word "ferrometer" is spelled with three syllables, pronounced /fəˈrɒmɪtə/. The first syllable "fer" is pronounced like "fur" without the "r" sound. The second syllable "ro" is stressed and sounds like "row" as in rowing a boat. The last syllable "meter" is pronounced like "me-ter" as in a measuring device. In terms of meaning, "ferrometer" is a non-existent word and therefore does not have a definition in the English language.
A device for estimating the proportion of iron in the blood.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.