karyochrome

kar·y·o·chrome

(kar'ē-ō-krōm'),
A nerve cell body having a nucleus that stains intensely with little or no Nissl substance visible.
[karyo- + G. chroma, color]

karyochrome

(kăr′ē-ō-krōm″)
A neuron in which the nucleus stains readily but the cytoplasm does not.