The word "gigantoblast" is a scientific term used in biology to describe a very large cell. The spelling of this word can be broken down into its phonetic components: /ˈdʒaɪɡəntoʊblæst/. The "g" is pronounced like a "j" sound as in "jump", the "i" is pronounced like an "eye" sound, and the "a" is pronounced like an "ah" sound. The stress is on the second syllable, and the "o" is pronounced like an "oh" sound. The final syllable, "-blast", is pronounced like "blast".
A large erythroblast, or nucleated red blood-corpuscle.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.