The spelling of the word "thyreo" might seem confusing at first glance, but it is actually quite simple when broken down phonetically. The word is pronounced "th-eye-ree-oh," with emphasis on the "th" sound at the beginning. The "y" serves as a vowel sound, creating the "eye" sound, while the "eo" combines to create the "ree-oh" sound. This unique combination of letters produces a word that is used in medical vocabulary to refer to the thyroid gland.
For words not here found, see under thyro-.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.