Word Study
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-blast
CIDE DICTIONARY
-blast, [Gr. blasto`s sprout, shoot.].
A suffix or terminal formative, used principally in biological terms, and signifying growth, formation; as, bioblast, epiblast, mesoblast, etc. [1913 Webster]
OXFORD DICTIONARY
-blast, comb. form Biol.
1 an embryonic cell (erythroblast) (cf. -CYTE).
2 a germ layer of an embryo (epiblast).
1 an embryonic cell (erythroblast) (cf. -CYTE).
2 a germ layer of an embryo (epiblast).
Etymology
Gk blastos sprout
For further exploring for "-blast" in Webster Dictionary Online