spon·gi·o·blast 
(spŭnjē-ə-blăst′)
(spŭnjē-ə-blăst′)n.
Any of the embryonic epithelial cells that give rise to the neuroglia.
[Latin spongia, sponge; see SPONGE + -BLAST.]
- imperatorial
- imperceptibility
- imperceptible
- imperceptibleness
- imperceptibly
- imperceptive
- imperceptiveness
- imperceptivity
- impercipient
- imperfect
- imperfect fungus
- imperfection
- imperfective
- imperfectly
- imperfectness
- imperforate
- imperia
- imperial
- imperialism
- imperialist
- imperialistic
- imperialistically
- imperially
- imperial moth
- Imperial Valley