The word "eyebulb" is spelled using the combination of two separate words, "eye" and "bulb", to form a compound noun. The IPA phonetic transcription of "eyebulb" would be /ˈaɪ.bʌlb/. The first syllable is pronounced with the long "i" sound, while the second syllable has a short "u" sound. This unique spelling may be tricky for some, but it accurately reflects the anatomy of the eye and its round, globe-like shape.