[i-rith-roh-bla-stoh-sis] 
| 1. | the presence of erythroblasts in the blood. |
| 2. | Also called eryth⋅roblasto⋅sis fe⋅tal⋅is [fi-tal-is] , erythroblasto⋅sis ne⋅o⋅na⋅to⋅rum [nee-uh-nuh-tawr-uh m, -tohr-] . this condition in the fetus or newborn, usually caused by an Rh incompatibility between mother and baby. |
[i-rith-roh-bla-stot-ik] , adjective erythroblastosis e·ryth·ro·blas·to·sis (ĭ-rĭth'rō-blā-stō'sĭs)
n. pl. e·ryth·ro·blas·to·ses (-sēz)
The abnormal presence of erythroblasts in the blood.