1) Epidermal cell 2) Precursor of a melanocyte 
A melanoblast is a precursor cell of a melanocyte. These cells migrate from the trunk neural crest cells (in terms of axial level from neck to posterior end) dorsolaterally between the ectoderm and dorsal surface of the somites. ...
A cell derived from the neural crest; it migrates to various parts of the body early in embryonic life, and then becomes a mature melanocyte capable of forming melanin. ... Origin: melano-+ G. Blastos, germ, sprout ... (05 Mar 2000) ... 
(mel´ә-no-blast″) (mә-lan´o-blast) a cell that originates in the neural crest and develops into a melanocyte.
Type: Term Pronunciation: mel′ă-nō-blast′ Definitions: 1. A cell derived from the neural crest; it migrates to various parts of the body early in embryonic life, and then becomes a mature melanocyte capable of forming melanin.
[n] - an epidermal cell that is a precursor of a melanocyte
noun an epidermal cell that is a precursor of a melanocyte