1) Embryonic cell 2) Formative cell 
Ameloblasts are cells present only during tooth development that deposit tooth enamel, which is the hard outermost layer of the tooth forming the surface of the crown. ==Origin== Ameloblasts are derived from oral epithelium tissue of ectodermal origin. Their differentiation from preameloblasts (whose origin is from inner enamel epithelium) is a re...
<cell biology> Columnar epithelial cells that secrete the enamel layer of teeth in mammals. Their apical surfaces are tapering Tomes processes) and are embedded within the enamel matrix. ... (18 Nov 1997) ... 
(am´ә-lo-blast″) a cell that takes part in forming dental enamel.
Type: Term Pronunciation: am′ĕ-lō-blast Definitions: 1. One of the columnar epithelial cells of the inner layer of the enamel organ of a developing tooth, involved with the formation of enamel matrix. Synonyms: enamel cell, enameloblast, ganoblast
[n] - a cell from which tooth enamel develops
noun a cell from which tooth enamel develops
one of a layer of enamel-secreting cells covering the dentin of a developing tooth.